1. Hold down Ctrl and click on the thumbnail of the non-background layer to load the layer into the selection;
① Add selection of selection (when using magic wand tool, lasso tool, marquee tool, hold down the Shift key to add selection.)
Note: If you hold Ctrl+Shift and click another layer thumbnail, it will The newly clicked layer is added to the selection.
② Subtraction of the selection (when using the magic wand tool, lasso tool, and marquee tool, hold down the Alt key to subtract the selection.)
Note: If you hold Ctrl+alt and click another layer thumbnail, it will The newly clicked layer is subtracted from the selection.
③ Cross selection of the selection (hold down the Shift key and the Alt key at the same time to select the cross selection of the selection.)
④ Select all (Ctrl+A can select the entire canvas.)
⑤ Cancel selection (Ctrl+D can cancel all selections.)
⑥ Reselect (Ctrl+Shift+D to reselect the last selection.)
⑦ Reverse selection (Ctrl+Shift+I exchanges the selection with the area outside the selection.)
⑧ Move the selection (when drawing with the selection tool, press and hold the space bar to move the selection.)
⑨ Perfect circle or square (when using the rectangular marquee tool or elliptical marquee tool to draw the selection, hold down the Shift key to draw a perfect circle or square.)
⑩ Draw the selection from the center (Press and hold the Alt key when drawing the selection to draw from the center.)
Shift+F6 feather setting, Ctrl+J to copy the layer, Ctrl+Alt+Shift+E to stamp the layer, it is to merge the layers to regenerate a new layer, the original layer remains. Ctrl+E merges the layers to create a new original layer no longer exists.