Both Imperial and metric dimensions

Yes, with a plugin. It’s something like Dual Dimensions, and by TIG.

See this previous post.

PS. But if you want to have some dimensions shown in Imperial units, and others in metric, I don’t think this plugin is the answer

An alternative workflow would be to set your Model Info/Units to one set (the one with fewest instances of dimensions in that unit), then overtype the dimensions displayed including the unit of measure (mm or cm, say, or inch(es)). Switch back to the ‘majority’ units, and draw those dimensions, accepting what comes up.