How set up the system correctly

Just recently, I started to learn the system myself. I am novice. Please help me set up the system correctly.

1. There is no option 'Select' in the pop-up menu.

2. There is no value of the angle measurement at the cursor.

3. Auxiliare lines are invisible (such as the line connecting the two circles).

4. Hotkeys installed but I can not activated them.

Thank you.

SolidworksSketching