If you want to create the symbol as i described above you can follow these steps.
(To what i showed in the last post first. This describes the edit symbol part.)
I use the 7400 symbol as an example.
If there are two screenshots next to each other, the left one is always the original (before your changes) and the right one is the result
Step 1 change the symbol properties:
After that your screen should look similar to this:
(You should have units A to E, Unit E is a copy of unit A)
Now comes the fun part. Changing our symbol such that units A to D look the same as they did before. (But without the power pins.) And unit E has our power pins.
First select edit pins per unit. (otherwise you will edit all pins that have the same position at the same time.)
Now we make it a bit easier for us. (we don’t want to draw a lot.)
Move [press M] all graphical stuff to the side (polyline and arc)
Select the whole graphical stuff at once by draging with your mouse. (box select)
right click and select copy block.
move this copy back to where you got the graphical stuff in the first place.
Open the properties [press E] of the arc and polyline and deselect common to all units for both of them.
Change to unit B.
It should look like you just moved the graphics to the side.
Again copy the graphic, move them into position and deselect common to all units in the graphic properties.
Repeat until you reach unit D. In unit D don’t copy the graphics just move them into place and again deselect common to all units.
Now A to D should look like when we started.
Change to unit E. It should look like this.
Save your changes. (Just in case you make a mistake in the next step.)
Remove the pins 1,2,3 (make sure edit pins per unit is still selected. Otherwise you will delete everything.)
Now open the properties of pins vcc and gnd [again press E] and do the following:
When you are finished with that move your pins into the middle and the reference and value field to somewhere where it makes sense. (This fields have the same position in all units. Yes this is not a good solution.)
When you are finished your unit e should look like this.
When this is done double check that the units A to D are still ok. (Only the pins VCC and GND should have vanished from this units. All other pins should be unchanged.)
If you are happy with the result save your changes und use your symbol.
(Don’t forget the safe library to disk button.)