HIMS Braille Sense U2 User Manual page 267

If you select "No," the Braille Sense U2 will save the bookmark that is
already set. If you select "erase," the Braille Sense U2 will delete the
bookmark that is already set.
9.3.4.2 Delete Marked Position
If you execute this function when you are playing a file, or when a file is
paused, it will delete the bookmark that was created before.
To execute this function,
1) Press "Space-m (dots 1-3-4)" or "F2" and move to "Position" by
pressing "Space-4."
2) Press "Enter" on "Position."
3) Move to "Delete Marked Position" by pressing "Space-4," and
press "Enter."
4) Or, you can press "Enter-d (dots 1-4-5)" when playing a file, or
when a file is paused.
If you execute this function in a file that does not have a bookmark, the
Braille Sense U2 will display "There is no bookmark in selected file."
9.3.4.3 Jump to Marked Position
If you execute this function when you are playing a file, or when a file is
paused, it will find a bookmark that has already been created.
To execute this function,
1) Press "Space-m (dots 1-3-4)" or "F2" and move to "Position" by
pressing "Space-4."
2) Press "Enter" on "Position."
3) Move to "Jump To Marked Position" by pressing "Space-4," and
press "Enter."
4) Or, you can press "Enter-j (dots 2-4-5)" when playing a file, or
when a file is paused.