Hi!
See the attached images.


I upgraded to the latest version v0.20.0.
When scrolling, the background of the toolbar disappears.
I had set following command:
jt -t chesterish -T -N -fs 14 -vim -cellw 90%
Thank you
Same here with:
jt -t chesterish -T -N -kl -ofs 10 -tfs 11
find your custom.css under ~/.jupyter/custom
search
div#maintoolbar
then, remove
position:absolute;

@hellenlima @baibai25
Thank you @arthurire
I'm using JupyterLab now. I will check it.
Thank you @arthurire . Your fix worked for me.
Thank you again @arthurire. I suggest that you should send pull request.
Should I close this issue?
Thank you again @arthurire. I suggest that you should send pull request.
Should I close this issue?
It's up to you.
I don't know how the author generates those css files exactly so I did not send a pull request.
@arthurire's fix worked for me too. thank you!
Some may have noted that when you change the theme, the toolbar background will be transparent again.
To make the the background transparent permanently, one should edit this file instead:
<python-site-packages-path>/jupyterthemes/layout/notebook.less.
Most helpful comment
find your custom.css under ~/.jupyter/custom
search

div#maintoolbarthen, remove
position:absolute;@hellenlima @baibai25