I came here to suggest a separate Alt Text panel to make applying them easier, but this is an even better idea. Accessibility is more important than ever, so Alt Text should be as simple to implement as possible. It's needlessly fiddly to find your image, right click on it, scroll to export options, select the Alt Text panel, use the dropdown to select 'custom' then type your text...
Actually, a full export options panel would work too...
I came here to suggest a separate Alt Text panel to make applying them easier, but this is an even better idea. Accessibility is more important than ever, so Alt Text should be as simple to implement as possible. It's needlessly fiddly to find your image, right click on it, scroll to export options, select the Alt Text panel, use the dropdown to select 'custom' then type your text...
Actually, a full export options panel would work too...