Once your property is being marketed, your letting agent will be able to maximise viewing opportunities by arranging viewings for you at times that suit you. Alternatively, you may give full unfettered access to allow greater flexibility for viewings. You will need to provide keys and access to any security measures you have.
It is also worth considering how you can get the most out of your viewings, to impress possible tenants. You should, for example:
Marketing Your Commercial Property to Tenants