I have a lot of issues to go through, so in order to make it easier for me to help you, I ask that you please try these things first

• Check out all the menus and keyboard shortcuts. Maybe the feature already exists?
• Try with the newest version from GitHub
• Read the documentation and FAQ, Known issues, Troubleshooting to see if the feature already exists
• See if someone already suggested this under Issues or Discussions

Description

I've found a handful of things regarding the interface that I feel could be improved to make using LC a smoother experience. Instead of making a separate issue for each, I'll just lay them all out here. If separate issues are preferred, let me know.

• There's no option to use the mouse scroll wheel to go frame-by-frame. Ideally, it should allow both the use of a modifier key to perform the alternate behavior from the default as well as provide a button to toggle the default, e.g. scroll without a modifier to go forward/back by keyframe and with a modifier to do so by frame, and click a button, like the one to switch the keep/delete selected segments mode, to flip that behavior.
• When going into certain settings, e.g. the "Change value" ones under the "Keyboard, mouse and input" section, once the setting is adjusted and the user clicks "Done" it should go back to the settings where they were.
• When setting keyboard shortcuts, if attempting to add a key already in use to another function, it should notify the user of this, and what function it's currently assigned to, instead of simply doing nothing.
• When showing the "Export options" window before exporting and opening the track selection screen, this screen is both a bit confusing and inconsistent with others throughout LC in that it requires closing it via the x to apply the changes (vs clicking a "Done" or similar button) and resulted in my clicking the check button ("Keep all tracks") thinking that was the confirm button. Also, the second icon/button at the top-right (between the file info and file metadata ones) doesn't have a tooltip. Finally, and most importantly, once the selections are made and this screen is closed, instead of taking the user back to the export options window like it should, it goes all the way back to the main interface.
• Very minor, but I prefer buttons for dialog windows to be in/near those windows, and find the "Export" button being all the way at the bottom-right to be a bit awkward. Perhaps because of the size of my monitor and the fact I have a lot going on on my computer and have stuff on my desk that partially blocks that corner of the screen, but it took me a few seconds to figure out what was going on as I was expecting the button to be at the bottom of the export options dialog, and especially since I had just had to close the track selection window to apply those changes, I thought maybe this was similar and had to be closed to start it. Certainly something that despite the initial confusion would be fine once used to it, but worth mentioning.

Aside from these minor issues (the first one is the only one I'd consider a must-have, whereas the others are just minor inconveniences), this appears to be a very well-designed and intuitive program. I've used multiple editing programs before, and I just tried a couple other popular ones and couldn't even figure out how to do basic timeline trimming, whereas this was extremely easy to just jump right into. Excellent job, and thank you.