I will explain a technique to remember. Once you get the idea, then you can select objects of similar complexity using the index bars in the computation window. You will notice that there is a direct correspondence between what is called an index progression and what you can select using the index bars.
STEP 1: select a volume region that is contained within the faces you wish to select. For example, if you want to select the two i-faces at reduced index i=2 and reduced index i=4, then you would select the interval in the i-index bar from i=2 through i=4. That is done with a click and drag of the mouse along the i-index bar from node 2 through to node 4.
STEP 2 & 3: do the same for the j and k-index bars, as needed. Note that if you do not select something within an index bar, it is interpreted as though you had selected the entire index bar.
STEP 4: You now can select any faces contained within this solid. Select a face by clicking on that face's associated node in the index bar. For example, click on the 2nd node along the i-index bar and the 4th node along the i-index bar.
STEP 5 & 6: Do the same for the j-index bar for any j-faces and along the k-index bar for any k-faces.
Edges and vertices have some special rules - no need to complicate things at this stage.
A complete description of this is found in the TrueGrid®? manual (with examples).
