I'm using Lightroom Classic 12.1 on my iMac. Is there a lens profile suitable for the Panasonic Lumix DMC-TZ100 (It might be TS100 in the USA)?
When you look at the lens corrections, is there an i on the panel? Usually cameras like these use built in profiles. More details here: https://helpx.adobe.com/x-productkb/multi/lens-profile-support.html
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To build on Sean's reply, the DMC-ZS100 does indeed embed manufacturer-supplied lens profiles in its raws, and LR applies those lens profiles automatically:
Is the "Remove Chromatic Aberration" box checked or unchecked. If it's unchecked, then check it. Does that clear the CA from the image? If it's already checked, click on the Manual tab and use the manual controls to try to clear the CA.
I had a quick play with the manual sliders, but it didn't make a change. I will have a further look later.
Thanks for your help, Geoff
That's definitely Chromatic Aberration, but as it's really blue, the button should fix this. There's an eyedropper in the manual tools @Jim Wilde mentions, try that if not before progressing to the sliders themselves.
Thank you everyone, you answered my questions, and the technique works.