missing contact tab

Missing contact tab, I imported csv. contacts which are all there but the contacts tab has now disappeared, why? I need to store all emails on my lap top so they can be pulled up when off line, does the default setting do this. If I find it successful i will purchase as I need multiple accounts. There seem to be mixed reviews, the most worrying are lost emails, any comments would be appreciated

Right click on any of the visible tabs (Mail, Calendar, etc,) and then left click on the “Contacts” option in drop down list. This will put a checkmark before “Contacts” and the tab should then be visible.

Cheers fixed