If you have not yet made a copy of the saddle that you will be using or a copy of your original horse, or haven't yet removed the saddle from a copy of your (AKK) horse, check the following technical articles, as you'll need to do these items first:
Making Copies of Horse and Saddle in InventoryRemoving the Saddle from AKK HorsesThis is a fairly complicated looking procedure at first glance, but it's really easy once you've done it, so hang on for our most important article, with plenty of pictures and tips.

1. First of all, open up your inventory window. Find the folder with the copy of your horse (with saddle removed or hidden, as appropriate) and the copy of the saddle you will be using.
Select the horse in that folder that you have removed the saddle from (if an AKK horse) with your mouse pointer. Left click on the inventory item and drag it to the ground. Your horse should appear on the ground in front of you (assuming you have the capabilities to build on the land you are standing on).

2. Now your horse is standing there, without a saddle on it. If you have a McLean's horse and the saddle is visible, simply left-click on the horse to bring up the menu. On the main menu, select Saddle. On the next menu, select "Saddle Off" and the saddle should be hidden.
Left-click on your EquineWorks saddle in inventory and drag it to the ground, away from the horse. Don't try to drag it directly onto the horse.

3. Now you should see your horse on the ground and the saddle nearby, as shown in this image. At this point, you are done with the inventory window and can close it.
We recommend that you have your camera controls open so you can pan around the horse without having to walk around it with your avatar in the way. To open the camera controls, go to the View menu and select "Camera Controls". Practice using the camera controls before attempting to move the saddle around.

4. Right-click on the saddle so that it is highlighted, and select "Edit" from the pie menu. Alternately, you can just hit Ctrl-3 on your keyboard to bring up the edit window.

5. With the saddle selected (highlighted in blue and yellow) and the edit window open (the Position button should be selected), you should see the red, green and blue position arrows in the middle of the saddle.
Moving the saddle around is accomplished by hovering your mouse pointer over either end of the appropriate arrow (red, green or blue), clicking on the arrow when it lights up brighter and dragging the object left, right, up or down with the arrows. Practice moving the saddle around in this fashion first.

5a. Check to see if your saddle is pointing the right direction. In this illustration the saddle and horse are both pointing the same direction. However, if the saddle is not pointing in the correct direction, you'll need to rotate either the horse or the saddle.
To rotate an object, hold down your Ctrl key (on Windows machines) and you'll see three rings appear in place of the positioning arrows. These represent the three axes of rotation that you can rotate an object about. Alternately, you can click on the "Rotate" button on the edit window, which might be easier since it leaves rotate mode always active, whereas using the Ctrl key means that rotate mode is only active when you're holding down the Ctrl key.

5b. To rotate the saddle or the horse to the correct orientation, we recommend that you move the camera view up above both, as shown here, so that you can more easily see the rotation and orientation.
Hold down your Ctrl key to get the rotation circles and grab the blue rotation circle with your mouse pointer. Hold down the left mouse button and move the pointer around and you'll see the saddle rotate around.

5c. You'll also see some handy guide lines outside the object that allow you to snap the rotation to a particular angle, including directly North, South, East or West. If you move your mouse pointer out far enough past that circle, you'll see the rotation snap to individual tick marks on the circle, allowing you to more easily line up the rotation exactly.
Once the rotation is correct, release your mouse button and the Ctrl key.

6. With the saddle and horse in the correct orientation, we're ready to move the saddle around. You want to leave the horse in the same place and only move the saddle around it. You could do the opposite, but moving the saddle is easier.
Move the saddle up to approximately the correct height in relation to the horse, as shown here. You don't have to be exact, as you'll fine tune the position later, but you want it somewhat close.

7. Move your camera to the overhead position as shown in this illustration. This will help you more easily line the saddle up from side to side. Note in this illustration that the saddle is a bit to the right as compared to the center of the horse. Therefore, we'll want to move the saddle to the left (in relation to the horse) a bit so that it approximately lines up with the center of the horse.

8. Here, we've move the saddle a bit to the left (towards the bottom of the picture) so that it is approximately lined up with the horse. Again, this step doesn't have to be exact, you just need it fairly close.
So, at this point, we have the saddle lined up in approximately the correct place, but behind the horse (or in front of it, depending on where you dragged it out onto the ground).

9. Adjust your camera position again so that you are looking at the side of the horse and saddle. You'll see that the saddle is still hovering at the height we last left it (assuming you didn't grab the wrong positioning arrow at any point).
This step is just a double-check to see if the saddle is about in the right position to start moving it forward onto the horse. So, grab the appropriate positioning arrow on the saddle and slowly slide the saddle forward into and onto the center of the horse.

10. Here's where we ended up with the saddle. As you can tell, we still have a little positioning work to do, as portions of the saddle are hidden by the horse's body.
Looking at the saddle in relation to the horse in this illustration, we can see that the saddle is sitting too low on the horse, as the base of the saddle is embedded down into the horse's body. So, we'll grab the up/down positional arrow and slowly move the saddle upwards.

11. Here, we've moved the saddle up and we're happy with the position so far. Note that you can see the base portion of the saddle on top of the horse's body, as well as the strap that runs underneath the horse's body. You may notice some portions of the saddle still embedded in the horse's body at this point, but the up and down position seems to be pretty much correct.

12. Move the camera up above the horse again and now check to see how the saddle looks from this angle. Note in this illustration that some portions of the back edge of the saddle base are just barely covered by the horse's body. This means that we need to move the saddle forward on the horse just a little bit, until those parts are uncovered. So, we'll grab the front to back positional arrow and move the saddle just slightly, watching for the hidden areas to just appear.

13. Looking at the saddle's position now, we're pretty close. The back edge of the saddle base is fully visible. The front edge has a small bit hidden, but we'll fine tune that in a bit. Note that moving the saddle around like this is somewhat time-consuming and painstaking, but essentially only has to be done once, so take your time and get it as close as you can and as good as you are happy with.

14. Rotate the camera down to the side again and zoom in if needed. Check the left flank piece on the saddle and see if any portions of the horse are covering that piece. In this illustration, everything looks OK since you can see the entire flank piece clearly.

15. Rotate the camera around to the other side of the horse and check the flank piece on that side. Ooops, looks like it is slightly embedded in the horse's side (see red arrow). What this means is that the saddle is slightly off from side to side, so we'll need to move the camera back up above and barely move the saddle to the right on the horse.

16. Here, we've moved the camera angle back overhead, but also so that we can see the flank piece from above. That way, as we barely move the saddle to the right (towards the bottom of the picture) we can see when the flank piece is fully visible. At an angle such as this, it's easy to grab the position arrow and still see what you are doing. You want to stop moving the saddle just as the entire flank piece becomes visible. Move the saddle slightly left and right to get it as close as you can.

17. Here, we have the flank piece fully visible and we're happy with the results thusfar. The flank pieces are your general guide to positioning the saddle from side to side.

18. Now, we've rotated the camera to check the flank piece on the left side of the horse. Hopefully, if all goes well, the entire piece will still be visible. If not, you'll need to gradually move the saddle left or right so that both flank pieces are fully visible. This is just part of fine-tuning the position.
Fortunately, in our illustration, we find that the left hand flank piece is still fully visible, so we're centered from left to right.

19. Now we can look at height one more time. Note in this picture that the front edge of the saddle base is just slightly embedded in the horse as pointed to by the red arrow. We're getting really close, but we can use just one more final adjustment. To get this fixed, we'll need to move the saddle just slightly upwards on the horse.

20. We've moved the saddle up just a bit so that the hidden area along the front edge of the saddle base is now visible. Checking from the side, we see that the flank piece is still visible (it has a slight angle so it should remain visible if the saddle is moved upwards) and, as well, the strap running under the horse is still visible. This particular illustration should serve as a reference of how the saddle should look when properly positioned.
If you want, pan around the horse one more time making sure that everything is visible, including flank pieces and the saddle base. Note that the front edge of the saddle base may still be partially hidden by the back edge of the horse's neck. Unfortunately, there's not much that can be done about that and, in most cases, the horse's mane will cover this.

21. Now we're ready for the final step - linking the saddle permanently to the horse. Note the word "permanently" was used here. Once we link the two together, further editing will be difficult at best and is beyond the general scope of this article. So make absolutely sure you are ready to proceed.
Click on the saddle so that it is entirely highlighted, as shown in this illustration.

22. Hold down the shift key on your keyboard and left-click on the horse. You'll see the entire horse highlighted in blue (and some in yellow). As well, you should still see the saddle highlighted, too. You have now selected both the saddle and the horse, in that order, in preparation for linking them together.
NOTE: It is important to click the saddle first, then hold down Shift and click the horse last. If you do this in the opposite order (clicking the horse, then the saddle), the link operation may render the horse inoperable. So make sure you clicked the saddle, then the horse, in that order.

23. Go to the Tools menu on your client and look down through the list of options. Near the middle, you should see the "Link" option and it should be available to click (the letters are white and not dark grey). If the Link option is not available, keep trying the menu until it is (sometimes lag will cause the option to not be available for a bit of time).
Once the Link option is available, and you are sure both the saddle and horse are selected (in that order), click the Link option in the menu. Once you select "Link", you cannot go back.

24. Here, the saddle is linked to the horse. Not much looks different, as the entire saddle and horse are all still highlighted. If you want to verify that everything linked together, grab the up and down positional arrows visible in the middle of the horse and raise the horse up off the ground.

25. If you successfully linked the saddle to the horse and move the horse upwards, the saddle should move with the horse as shown in this image. If so, then you are pretty much ready to go at this point. However, to avoid confusion, let's rename the horse (with saddle) again (if you want) before taking it back into inventory.

26. To rename the horse (AKK only), drag your edit window over where you can see it (if it isn't already visible) and select the General tab on the edit window (click the "More" button if you have a small edit window). Change the name of the horse to something you can remember and will make it easy to find in inventory. One you have it renamed, you can close the edit window.

27. Take the horse with saddle back into inventory by right-clicking on the horse and selecting "Take" from the pie menu.
There you go. Your horse, with saddle attached, is now in your inventory, ready for you to ride (by selecting "wear" from the inventory window). When you first ride the horse, you may notice that you are sitting too far forward or back in the saddle and that the stirrups might not be properly positioned on your feet. To correct these issues, consult the appropriate technical articles listed here:
Once your saddle is attached to your horse, you may need one or both of the following articles:
Adjust the Position of the StirrupsAdjusting the Bottom Strap