Skew:
For most satellites especially ku band have got roughly similar lnb skew requirements. For example lnb skew for 8w, 7w, 4w, 3w, 3e 5e, 7e 16e ku are all roughly similar and mostly you would not need to tweak your skew while jumping from one to another unless the signal is very dim and needs extra tweaking.
For Cband skew is a problem because lnb skew for one sat is often not same as the next. Or even one sat may need biscuit the next may not need it.
Solution to this is to put 2lnbs skewed differently next to each other to meet the unique requirements of those sats.
Luckily on the Eastern arc. 68e, 72e,76e 91.5e use the same skews and do not need biscuits so you can cruise accross using a single lnb..
But if you want to add 57e C or 45e C to that set up, you'll need to fit another LNB with the biscuit inside.
Azimuth/Elevation:
This is the East-West movement of the dish while tracking an imaginary line above the equator where satellites are located.
Now you just need to set your dish to move along this imaginary line for instance while jumping from 7w to 7e.
With cband you will hardly need to adjust your azimuth while switching sats. I used to move from 57e to 91.5 without any problem.
But ku band is quite unforgiving especially fringe sats like 4W. Azimuth setting for 7w will work for 4W but youll have to compromise signal strength for 4W. 7e 5e are ok because the beams are very strong. But by the time you hit 16e, you're completely off. And you will need to adjust elevation (North - South movement from the Equator line)
The solution to this is to use a very large dish 10ft + or use a dual-axis motorized setup which adjusts both Elevation and Azimuth for each sat.
You can also change skew automatically while switching sats. But this is hardly ever necessary and requires complex positioners like this Titanium ASC1 I use. Here the 45° show the LNB skew setting. But I've never used that feature.
View attachment 1506769
And finally if you're going to motorize your set up get a large dish .. 8ft onwards to compensate for misalignments caused by the movement.
But small dishes can also work for short movements eg 7W to 5e