Thanks! the "reset dialogs" trick worked very well!
- It happened in the first place when I was editing parameters of actions I had in an event sheet. If i remember well, when I edited the 3rd or 4th action, then the buttons dissapeared and they didn't come back any way (nor resseting C2 and computer)
- No, I don't switch between computers, and I work always with the same monitor and resolution. Anyway, I have a 2-screen configuration in my computer. I work with C2 always on monitor "1" at 1920x1080.