How to make rulers and grid show the same coordinates and units?
Currently it shows absolute delirium for me:
You either have (as you noted yourself) different units set for the grid and ruler, or the grid is set to repeat on a weird interval.
You can change the units of the ruler by right clicking on it. For the other settings, you have to look into the preference pane (
ctrl+K). Units are obviously under the
Units tab. Changing the grid is done under the
Guides & Grid tab and then the setting
Gridline every: where you can choose how often the grid repeats. The ruler repeats with a multiplier of 6 when using points or pixels, and 10 when using mm or cm, so to line them up you should do the same with the grid (and change the setting