Tested with Racket 8.5 from the PPA on Ubuntu 22.04 with a GNOME desktop running with dark theme. Screenshot attached after a few random clicks in the window to show some lines of text drawn.
To clarify: when the window is first opened, no text is visible. Each time I click in the window (or click+drag), the line of text at that position is drawn (or drawn and highlighted, respectively).
Tested with Racket 8.5 from the PPA on Ubuntu 22.04 with a GNOME desktop running with dark theme. Screenshot attached after a few random clicks in the window to show some lines of text drawn.
To clarify: when the window is first opened, no text is visible. Each time I click in the window (or click+drag), the line of text at that position is drawn (or drawn and highlighted, respectively).