user interface design

[River-Mochi]

just a suggestion.

Framed Box around the Drop-down list rather than just the blue line under it. it perhaps might be more clear there is a drop-down list to choose from and prevent some confusion. some people do not realize they can click on the word Custom and something will change. but a Box around it is one suggestion.

[gamelaster]

This is how it is specified in Material Design, and I'm not quite sure if I can configure it.
Thinking about how to improve it, but no idea yet.

[Ralim]

If the default is custom; maybe default to -- Please select version -- or some such, so you need to click it to get further controls