I would like to export my indesign file as a mid quality PDF. The preset offer low quality (9 mb), high quality (124 mb) and press quality versions, but I'm looking for something in the middle. How do I do this?
you could use low quality but before exporting your file to pdf you can increase the values of resolution, for example 150 pixel/inch.
Also you can save this personal setting
Try exporting it from InDesign selecting the High Quality Print preset, then open the PSD in Acrobat Pro and: Save As Other > Reduced File PDF.