I setup a custom paper size - 162 mm w x 114 mm high (C6 envelope) but it keeps printing the wrong way round; portrait instead of landscape and not centered. It sounds simple; I know, however I've tried all sorts of different settings:
exporting as pdf; printing from apple preview> auto rotate enabled & disabled, scaling to fit, not scaling etc...;
printing from indesign with hundreds of different settings;
The closest I can get is using a predifined A6 setting; though this is obviously wrong. Has anyone managed to print out a C6 envelope; if so how did you manage to do this?