Hi there Bob
Here's what I'd do, step by step.
It's not perfect, especially, for example, if you've got reverb printed on the recorded drum track, but it should get you somewhere near.
I've used a mono track in my example, but it works just as well for a stereo track, or multiple tracks.
Here's the drum track I'm going to work on, I've added a drum fill at the end of every second bar:
Let's assume, like you, that I want to replace the fill at the end of measures 4, 6 and 8 with the drum fill at the end of measure 2:
First off, you'll need to use the Split Tool to separate off the fill you want to keep.
Don't turn off Snap To Grid, unless it's absolutely necessary to allow you to split the track exactly where you want to.
In my example, I've changed the Snap To Grid resolution to 1/32 of a measure, as that allows me to nicely split off the fill.
Place the Now Time Marker on the drum track at the point you wish to split, and either left click and use the keyboard shortcut '
S', or right click and choose
Split from the options:
Now repeat the process to Split off the corresponding clips at the end of measures 4, 6 and 8:
Once you've isolated these three clips, hold down the Ctrl key on your PC keyboard and left click on them in turn to select them all.
Now, hit
Delete on your keyboard, or alternatively right click on the final clip after you've selected it and click on
Edit > Delete:
The easiest and quickest way to copy and paste the fill you want to use in the three 'gaps' you have created is to do this. First, click on the middle mouse button and change the Smart Tool cursor to the Move Tool. Now hover the mouse pointer over the clip, then hold down the
Ctrl key and hold down the left mouse button.
Continuing to hold down the left mouse button, you can now literally drag the clip into one of the gaps. Providing you have Snap To Grid set to the same resolution you used to split the clips, and also providing that the gaps you have created are the same size as the clip you are moving, you should be able to drop (let go of the mouse button) the clip exactly into position. Note that holding down the Ctrl button when dragging
copies the clip - the original will not be moved (Tip: after the first drag, remember to deselect the clip you have just moved, or the next Ctrl-Drag operation will move that as well as the original clip):
Don't worry if you don't drop the clip exactly, you can always move it around after with the Move Tool selected.
Now all you have to do is repeat the process to copy the fill to the other two gaps:
Hopefully, that's job done!
Steve