Rather having to do on each task, is there a way to say a resource is only 1/2 time (or whatever is appropriate 75% available, 25% available) to the overall project so that you don't have to make that resource 50% on every task they are assigned?

 I cannot find this answer anywhere. i'm sure it exists and so if some can either answer directly on how to do this or where the information is, that would be fantastic.

thx.

We have never found a way, since Daptiv does not use individual calendars for its task scheduling and there is no place we have found where such an overall availability value can be set.

You can track time by the project and not the task and allocate the resource to the project with .5 FTE.  Both changes are made in the Admin Zone (Go to General Properties and change Capacity Planning Units from hours to FTE and go to Project Types and check the Track Time at the Project Level box for that project type).  Caution, this will change the hours to FTEs for all projects and the project type you change will not allow tracking by task.  For some users, this is a good option.  You can also create a tracking task for time reporting and assign the resource at 50%.  This is quick and works.