I find these following shortcut-keys essential.
ctrl + using mouse to select where to add cursors.
Double click to select the first + hold
ctrl + double click other to select more
Place the cursor at the text +
ctrl + D to select it, then
ctrl + D again to select the next instance of the text. Repeat to select more.
ctrl + J at where I want to join.
ctrl + X.
ctrl + shift + up/down
Place the cure sure some where in the line, then
ctrl + shift + D
ctrl + ] / ctrl + [
ctrl + P, then search for its name.