Is there a way to adjust the canvas size? The workable area stretches beyond my laptop screen and I have to scroll... some of the tools work slower doing their

Is there a way to adjust the canvas size? The workable area stretches beyond my laptop screen and I have to scroll... some of the tools work slower doing their patterns when the canvas is this large. (I'm on Firefox's latest release, I've whitelisted their JS in noscript and even tried opening a private browsing window where uBlock is disabled in case some of the privacy stuff is interfering w/ rendering) But other than that cool work, it's really bringing me back to elementary/early middle school days... I wish I had some of the abstract art I'd create sitting waiting for the bus, but alongside sim cities and old essays it's gone with the (digital) wind...