Not 100% certain, but likely with javascript.

Hi Bill, could you please let us know which spinner exactly you want to change? Is it the one that’s part of the action “Show message and block UI”? If not, please describe when it appears and/or attach a screenshot.

Hi Bill, I investigated further in the meantime. If you meant the spinner that’s part of the action “Show message and block UI”, I’m afraid it can’t be customised in V2. However, if you meant the spinner that appears when the Skuid pages is loading (Lightning Loading indicator), this can be replaced. Please see Zach’s response here: https://community.skuid.com/t/is-it-possible-to-use-a-custom-loading-indicator-in-place-of-the-skuid-provided-indicator