Large IMAGE Search
Always look under > Tools > Large The bigger the better Also, Rachel Won provided us with this great site with HI-res images https://unsplash.com/
Background layerWon't erase a until it is a layer 0 (Double - click and it will turn into one.)
Coping from layer another photoshop file: just Duplicate layer, pull the drop down menu, find your photoshop document and hit OK. You image will now be on your DESTINATION file without pushing a bunch of other files out of the way.
Making a Small Image Appear Sharper
Rezing Up - a LOW RESOLUTION picture. First you can't fix something that has too few pixels. It only works on a "relatively good image" View Layers Go to IMAGE > Image Size > bring your 72ppi up to 100px. Perhaps adjust levels and do AGAIN.
Then go to (FILTER > Sharpen > Unsharp Mask). Adjust your anmount, radius and threshhold of your image. Be sure to have your "preview" button clicked on. You also don't want the preview so sharp that you start getting a "halo effect" Click for the VIEW LAYERS image.
Everything that is DARK will became transparent. Best used to add smoke, fire, clouds or anything where your want the image to be sort of trnasparent AND your want the next bottomlayer to read clearly.
SCREEN mask used over Cheerleaders
MultiplyEverything that is WHITE will became transparent. Black line work will hold