Hi ChimeraX developers, Sorry about that previous email... Please let me know if there is a better way to report bugs. I have been trying to use 2dlabel to annotate some things in a movie. I have stumbled across a number of problems: 1) creating 2 labels with the same name causes a crash (v1 quits and daily build just displays the log bellow under Fedora 32): 2dlab create ADP text "ADP state" color black size 26 bold true xpos 0.03 ypos 0.92 visibility false 2dlab create ADP text "ADP state" color black size 26 bold true xpos 0.03 ypos 0.92 visibility false Traceback (most recent call last): File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/cmd_line/tool.py", line 263, in execute cmd.run(cmd_text) File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/core/commands/cli.py", line 2805, in run result = ci.function(session, **kw_args) File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 88, in label_create return Label(session, name, **kw) File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 512, in __init__ lb.add_label(self) File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 400, in add_label nl.delete() File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 530, in delete lm.delete_label(self) File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 417, in delete_label self._labels.remove(label) ValueError: list.remove(x): x not in list ValueError: list.remove(x): x not in list File "/opt/UCSF/ChimeraX-daily/lib/python3.7/site-packages/chimerax/label/label2d.py", line 417, in delete_label self._labels.remove(label) See log for complete Python traceback. 2) set bgColor hides labels 2dlab create ADP text "ADP state" color black size 26 bold true xpos 0.03 ypos 0.92 visibility false # label is there (although visibility false?!) set bgColor white #label is gone 3) labels created with visibility false are still displayed see above. But I can change visibility with 2dlab change Thanks for any help! Lukas Kater