I've been doing some reading on print resolution, namely the 360ppi for Epson printers. I'm generally printing directly from Lightroom and have the Print Resolution set at 360 and using an Epson 4900.
From what I understand, if the native resolution after sizing the image in LR for the page is below 480, then adding 50% to this resolution will help/improve the quality of the output (in most cases). So for example, I size an image and the native resolution comes out to 252ppi for the dimensions I want. Does this mean to change the setting in LR's Print Module, Print Resolution from my normal 360, to 378? Or do you have to send it PS first, resize it to 378, back to LR and then leave the Print Resolution setting off (or does that actually do the same thing)?
I just want to make sure I understand correctly.
And, if the resolution is below 360 even after this, do I leave it alone or do I set the Print Resolution in LR to 360ppi again?