The grippers in the current beta currently have no function - they could be used to resize or hide the channel descriptions and/or the Annotations/Analyzer-settings (see mockup-screenshots)
You can use the Select files button or drag files from your computer.
Agree - It would be great to be able to increase the width of channel name so longer names do not get truncated!
I agree giving the GUI more resize-ability is very much needed especially when considering custom protocol analyzer plugins that may have longer decoded protocol entries on a line.
These handles seem like a valid use case for what is currently unused. I would imagine we are not the only ones to try clicking and dragging these to attempt to resize the GUI or expect some function from them.
You won't be notified about changes to this idea.