Macros

slightly confusingly / is used a percentage multiplier  so

chan 1 @ / 95   will reduce by 5%

chan 1 @/105 will increase by 5%

(and for completeness if you dont want % then chan 1 @+10 will increase by 10 and chan 1 @-10   this can also be used with hue/sat/pan/tilt etc so if working on nomads having buttons that do that for tweaking focus or colour are useful)

The syntax for adding 5% is @+05 Enter.

To subtract 5% add a negative value, so @+-05 Enter.

Are you sure?

I think that adds 5 to the channel value not 5% 

ie

 chan 1 @50

 chan 1 @+10

sets the channel to 60

whereas

 chan 1 @50

 chan 1 @/110

sets it to 55

and chan 1@+05 adds 5%, as stated

There's always a confusion about language. What do lighting people mean when they say percent. There are mathematical percent (which we usually don't mean in our every day language) and what I call "lighting percent", sometimes referred to as points.

Mathematical percent: you start with 50, add 10% and expect to get 55. Use @/110 (downwards is @/95)

Lighting percent: you start with 50, add 10% and expect to get 60. Use @+10 (downwards is @+-10)

It does depend on what you are trying to achieve.

If you are running a bunch of lights at 20 and some at 50 and you want to increase it all uniformly and in proportion then select all lights and then @ / 120 will achieve that whereas @ + 20 would turn on the lights that were off and change the relationship between the lights that were on.

No you don't. (Maybe you do, but I'm guessing you don't.)

What you want is the [+%] & [-%] buttons on the console. Default is 10%, but you can change the settings to make it 5%.

Settings / User / Manual Control / ( Plus % / Minus % )