Can you make client custom fields compulsory on data entry?

Hi,

You can add a new client either by adding a client, or from the project creation page (Add project) using the Add Client link. We have a situation where I'd like to add a custom field to the client that I'd like to make compulsory to fill out, and make the entry relatively easy.

My questions are:

- is there a way to make a custom field compulsory, i.e. you cannot enter or save a new client without adding that information? (like in Pipedrive, etc.)

- is there a way to make the data entry easy, i.e. make this field appear on the little form that pops up or the client creation page where only very limited set of data needs to be entered?

Thanks!

Istvan