3.4. Multiple selection & aligning frames
You can select more than one frame by clicking the first frame, then shift-clicking on another frame, or by dragging a rectangle around the frames that you want to select. Multiply-selected frames have special halos that look like this:
At the top is the drag halo, just like the regular frame drag halo; dragging this will drag all selected frames. On the left is the align halo; clicking on the align halo brings up the align HUD, which looks like this:
Clicking any of these buttons will align the selected frames in that way.
To the right of the align halo is the grouping halo. If this is clicked, all selected frames will be grouped: clicking on any of them will select all the frames, and the individual frames can no longer be directly edited. Grouped frames have slightly different halos:
The enter halo, on the left, allows you to enter the group: when this is set, you can edit the individual frames in the group without breaking the group. The ungroup halo, to the right, will ungroup the grouped frames, returning them to the way they were before they were grouped.
