Log activities / hours spent on a project

Log activities / hours spent on a project

We are a consulting company and will use PROJECTS to log the hour spent by our consultant on each project.
It seems that i have to select a project and be in the project to log my activities / hours.

I can't log it from one page by selecting the different project I work on.

This is an issue as our consultants can simultanely work on 10-20 project so it is really time consuming.

Is there a solution for that ?

Thank you