With no documents open - go to the preferences and set the settings there.
And with no documents open - untick it in the View>Grids and Guides
That will affect all new documents, not documents that this may be already set in.
To change each of them, open them and follow the steps outlined above.
To turn off any feature that is appearing in new documents that open up you should first close all the documents and then in the No Document state of InDesign, turn\change that feature.
So for your specific case, close all documents and then turn off the baseline grid feature. Then onwards any documents that you open would not show baseline grids until turned On.
There is a preference setting in the preference dialog > Grids > Baseline Grid > View Threshold, which is by default set to 75%. It is because of this setting that you see this in files that have smaller page size, since there page size is smaller they generally have a higher zoom size (more than 75%) which satisfies the preference setting just mentioned.
Hi Mohammed, Just tried your suggestion and it now works perfect, Thanks for taking the time to help me.
Hi, Just tried your suggestion and it now works fine, Thanks for taking the time to help me.
I have the opposite problem. Grids will not turn on. I tried to set them as above, no effect.
Grids don't show if you are in Preview or Overprint Preview/Separations Preview mode, nor if you are zoomed out beyond the threshold set in the prefs.
Oh my goodness. Menu, View, Screen Mode, Normal, and there they are. Thank you!! And there are my hidden characters, too! In the Olden Days, I don't think there was a menu item called "Screen Mode." All the view choices were up at the top of the View menu.