Batch resize images in Libreoffice Writer with PicTool

Change multiple images in Writer with PicTool

You can batch update all images in a Writer (LibreOffice) document with the awesome PicTool extension:

After installing the LibreOffice PicTool extension, you might try to look under the menus, styles, etc. to find it ... but it's nowhere to be found.

But look in the upper left corner, under "File", where it's hiding in plain sight :-)