https://www.youtube.com/watch?v=KAmSB5MQxOo
This video includes a lot of quick things we may have gone over in class as well as so much more. Control J duplicates a layer, and control E merges a layer with the layer beneath. To insert a photo into photoshop you can drag the image from your desktop, and to scale the image you can drag the corners or press Alt + Shift to uniformly scale from the center outwards. The control key itself will skew the image any way, control U will bring the hue saturation and brightness menu up, and control I will invert the picture. Control F will reapply your last effect within the gallery. To add any layer styles you can double click on the right side of a layer to bring up effects only for that layer. Turning off the eye on a layer will remove all effects of that layer. Control + Shift S will “save as” a PSD to retain all layers or just save as a PNG or JPEG to just keep the flat image.