For mac users, replace the Ctrl key with the Option key.

Working with Words

ShortcutAction
Ctrl + Left ArrowMove cursor to beginning of current word.
Ctrl + Right ArrowMove cursor to beginning of next word.
Ctrl + BackspaceDelete previous word.
Ctrl + DeleteDelete to next word.
Ctrl + Up ArrowMove cursor to beginning of paragraph.
Ctrl + Down ArrowMove cursor to end of paragraph. (Not succeed)

Selecting Text

ShortcutAction
Shift + Left / Right ArrowSelect characters one at a time.
Shift + Up / Down ArrowSelect lines one at a time.
Shift + Ctrl + Left / Right ArrowSelect words - keep pressing the arrow keys to select more.
Shift + Ctrl + Up / Down ArrowSelect paragraphs - keep pressing the arrow keys to select more.
Shift + Home / EndSelect the text between the cursor and the beginning / ending of the line.
Shift + Ctrl + Home / EndSelect the text between the cursor and the beginning / ending of the text entry.

Editing

ShortcutAction
Ctrl + ZUndo.
Ctrl + YRedo.

Formatting

SHortcutAction
Ctrl + BBold.
Ctrl + IItalic.
Ctrl + UUnderline.