Chain-selection menus too long when there are many chains, and some can't be scrolled

[Elaine Meng]

On Dec 30, 2021, at 6:31 AM, Antón Vila-Sanjurjo via ChimeraX-users <chimerax-users@…> wrote:
Hi Elaine,
I regularly have many ribosomal models opened at the same time, with hundreds of different chains. The "Select Chains" display does not help at all in chain selection because the chains don't fit in the screen and there is no way to scroll down to find chains in the "models" with high numbers. A similar problem occurs while selecting chains in the Matchmaker interface. The "Sequence viewer" displays chains in a much better fashion because there is an option to scroll down. Would it be possible to fix these issues?
best,
Antón

Elaine: I believe this refers to both Matchmaker and the Select... Chain menu, whereas (as he said) the interface shown by menu: Tools.. Sequence... Show Sequence Viewer is scrollable. I will suggest workarounds for now are the "matchmaker" command and "log chains" to give a better interface for selection.

[pett]

So the general idea is that menus are used when one selection only is expected, and scrolling regions when multiple selections are possible. This tall-menu issue is not a problem on the Mac, since menus will scroll if the mouse goes to the top or bottom. I will see what I can do about Linux.

[pett]

Long menus worked on Windows and Ubuntu 18.04. In both cases the menu was shown with multiple columns so that all the items could be seen/chosen.

So, Anton, this is not what you get with your Ubuntu 21.10? Can you try the Xorg window manager instead of Wayland and see if the menu behavior is different? It's pretty easy to switch, as described here: ​https://fostips.com/switch-back-xorg-ubuntu-21-04/