A typical notification could have a number of states, like High, High-High, Low, Low-Low, etc. Rather than assigning specific values for each of these, the template lets you create variables for them, so that you can redefine them once for all notifications using this template, if necessary. Here's how to create the variables:
In the HiLoAlarm template we created previously, in the Configuration Template window, go to the Variable Definitions section.

Use the button to create the following variables:
| Variable Name | Is Trigger | Type |
|---|---|---|
input
| Yes | |
output
| No | |
hihilimit
| No | |
hilimit
| No | |
lolimit
| No | |
lololimit
| No |
You can use the and buttons to rearrange the list.
Now you can create states for these variables.