Version 1.1.0 now has the ability to batch-merge textframes within every page of the current document. I had several requests for something like this (including from a recent donor). Here it is! The download links above have been updated.
The new version now has the “Apply to” and “Ignore locked layers” as shown in the image below.
Note that any warning messages about having too few textframes selected have been delayed until after the dialog box appears to reflect the new options.
Downloads of the new version are available on the original post.
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