Controlling the Viewport/ Display, to keep it focussed on a particular part/ solid/ body

i am writing to ask for help in controlling the viewport/ display.
i have a complex assembly. when i go to rotate the
viewport, it rotates about i'm not sure which point, but it rotates the object of interest, out of the viewport.
so i have to zoom all (zoom extents, i think it's called in Autocad), rotate the part, zoom back in ... it takes a lot more time to do it that way.
in 3D Max, there's a mode where the viewport center is rotated about Selected Parts, whichever parts are in the selection set when you go to manipulate the viewport.
how do you get the viewport to rotate about selected parts in Solidworks 2005 ?
TIA for any assistance !
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
P.S. i looked up Rotate View in Help. it says to click Rotate, the icon with 2 circular arrows, and to then select the edge or surface i want to rotate about. it doesn't seem to be any more controlled of a viewport movement. i have a feeling there's a SW command option that i'm missing, still.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
If I remember back to SW2005 correctly, you could middle-click on a vertex and then middle-click and drag somewhere off the part and it would rotate about that vertex.
WT

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wrote:

thanks for the reply ... but, just tried it, the viewport is rotating about some center of its own choosing.
i would love to get this figured out. there has to be a way.
H E L P ! ! !
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.