Update to previous comment: somehow I posted an in-progress version of the Stylish style and not the completed version. Here it is. This one shows the current pane header at the top; if you want to remove it, just change .paneHeaderRow2 in the first line to .paneHeader and the .paneScroller top value from 36px to 0px.

@media print {
#desktopMenu, .paneHeaderRow2, .itemCheckbox, .fancyButton {
display: none !important;
}
#panes {
left: 0 !important;
}
.pane {
transform: none !important;
width: auto !important;
border: none !important;
}
.paneScroller {
top: 36px !important;
}
.paneHeader {
background: white !important;
}
}

Another vote for this. As a workaround, I made a Stylish style that applies print-friendly styles when printing. Only prints the first visible pane. Here are the styles:

<code>
@media print {
#desktopMenu,
.paneHeader,
.itemCheckbox {
display: none !important;
}
#panes {
left: 0 !important;
}
#pane {
transform: 0 !important;
width: auto;
}
.paneScroller {
top: 0 !important;
}
}
</code>

Printing might be a bit old school but having the option to print a text quickly helps me a lot to check a written text for mistakes and to analyze its structure. I just like pencil and paper as much as I like my computers...

Add an 'export to paper' option? Tasks, color coded correctly with checkboxes on one side?