Another option is to use this JSON trick to create an untyped object that shows the first field as its display value and more fields on hover:
Taken from this doc here:
P.S. You can use spaces as keys of that JSON to make a more compact tooltip:
@Jean_Pierre_Traets 's approach above is overall simpler though. A table is easier to edit than a formula and unlike a formula it won’t calculate towards object quota in a free plan. My solution is more of an alternative for one-offs where you’d want this minimal tooltip UI specifically.