I just realized (after many years of using FC

), that very similar, almost the same icon is used for closing FC dialogs and for Delete. I think it's not good, it might be confusing...

- fcxiconScreenshot_06032017_120201.png (14.74 KiB) Viewed 3743 times
My suggestions:
1. Do not use any icons for OK and Cancel buttons.
2. Use the other icons with colors (green and red), perhaps like this, close dialog button in Win10 explorer:

- fcxiconScreenshot_06032017_120925.png (310 Bytes) Viewed 3743 times
3. Use the other icons without colors (grey), like this from explorer:

- fcxiconScreenshot_06032017_120922.png (237 Bytes) Viewed 3743 times
4.

- fcxiconScreenshot_06032017_122359.png (224 Bytes) Viewed 3743 times
Comments are welcome, which solution (if any) do you prefer?