Dot:

repeat the last change.

x:

delete the character under the cursor.

u:

undo the changes.

dd:

delete current line as a whole.

>G:

increase the indentation from the current line until the end of the file.

h,j,k,l:

h:left j:up k:down l:right

i:

enter Insert mode

Esc:

enter Normal mode

Example:

Contents Tip2