Indesign uses the UPM value to calculate how the glyphs are going be rendered at a certain font-size. If you change it, the font will appear bigger or smaller for the same font-size. The baseline-to-… (View Post)
You can read this tuto for vertical metrics, it triggers a little bit why Indesign is reacting this way. From experience, it definitely reacts to vertical metrics but the default linespacing (baselin… (View Post)