Unwanted sign on each line of worksheet

Question

I don\'t know what the hotkey I accidentally clicked, but this Ǧ looking sign appeared on every line of code, and there are grey dots instead of spaces in the

Answer 1

Assuming this is SQL Developer, go to Tools->Preferences (or on Mac, find that under the SQL Developer menu). Expand the Code Editor section and click on Display. Untick "Show whitespace characters" (second checkbox in the list).

You can check for defined shortcuts under Preferences, in the Shortcut Keys section. On Mac there isn't one for this, but Windows has it as Control+Shift+W, which will also toggle them off if you don't want to go through the preference pane.