Baseline grid across spreads

I ended up going through the document, selecting every text box and disabling the custom baseline option (only 21 pages so didn't take long). For whatever reason, all the left pages had a text box with a custom baseline setting. I've always thought that the baseline setting in preferences should be a doc level setting. The script kept giving me a variable error but I'm not familiar enough with scripting to know where the issue is. I would appreciate having the script since we also produce a lot of long documents.

Thank you everyone for the advice. I love these forums.

Cheers...

Hi @stewart tower , also your baseline grid preferences cascade from the application to the individual text frames.

If you close all documents, set the baseline grid to 11pts, the baseline grid for all new docs will be 11pt. If you open an existing document and set its baseline grid preference, the change will only apply to that document.

For individual text frames, if you open Object>Text Frame Options with nothing selected, and turn on Use Custom Baseline Grid, all new text frames you create will have the custom grid applied. If you select a text frame, open Text Frame Options, and set a different custom baseline grid it will only apply to that frame.

For an existing document there might be a complex mix of baseline grids, which could be made uniform via scripting. This script would turn off all the active document’s custom baseline grids and set the document’s grid to 11pt:

var d=app.activeDocument;  
d.gridPreferences.baselineDivision = "11pts";
d.baselineFrameGridOptions.useCustomBaselineFrameGrid = false;

var mbl = d.masterSpreads.everyItem().textFrames.everyItem().baselineFrameGridOptions
for (var i = 0; i < mbl.length; i++){
    mbl[i].useCustomBaselineFrameGrid = false;
};   

var tf = d.textFrames.everyItem().baselineFrameGridOptions;
for (var j = 0; j < tf.length; j++){
    tf[j].useCustomBaselineFrameGrid = false;
};