How to set start or end of subtitle to the cursor

If you want to quickly set the start or end of a subtitle to the actual timeline cursor position, you can use this buttons:

• The first button set the next start of subtitle to the actual timeline cursor position.
• The second button set the last start of subtitle to the actual timeline cursor position.
• The third button set the next end of subtitle to the actual timeline cursor position.
• The fourth button set the last end of subtitle to the actual timeline cursor position.