Found this at
[REF] *Leo Hints, Tips and Registry Tweaks* - Updated 10th October 2010. - xda-developers
By default the left softkey on the the Sense home tab is coded to Phone which is pointless and a waste because you can get to the same Phone page by pressing the Send hardware key. Change it to the All People page (eliminating 2 taps) by using the following reg entry:
HKLM/Software/HTC/Manila
HomeLSKPath =
!"\Windows\manila.exe" --switchtopage Manila://people\browserlayer\?.page
HomeLSKText =
Contacts
Another suggestion was to change it to
HomeLSKPath = Manila://people/browserlayer/peopleAll.page
from http://forum.ppcgeeks.com/manila-tf3...ml#post1517816
but I haven't tried this one...