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In this tutorial, we

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will learn how to specify
and utilize the number variable type

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so these can be used
where a numerical selector is required,

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such as when linking
to a font size, for example.

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And that's the example
we'll do here as well.

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So to begin,
if I go to my variables tab within Invent

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and InDesign

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and click on Add Variables.

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Now what I'm choosing at
this time is a number variable.

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There's a few simple options
that I can complete.

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The first is to fill in a name

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and then I can select a default value.

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So this is the number
that will be utilized by default.

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If it is something like a font size
that we're linking to,

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this is the font size
that will eventually be used

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when the product is first opened.

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I've got some user interface information
over on the right hand side

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so I can change
the label if I wish to do so

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and I can put in some help information.

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I've optionally got some validation
information as well,

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so you can specify a minimum and a maximum

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number that it is possible to enter
along with some validation messages.

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Should you go outside of those ranges.

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So this validation is optional,
but seeing as its font size,

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it would be a good idea
to put something in.

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And then I can put
in some associated messages.

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I also have the ability
to specify the step increment.

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So in what increment
can this number picker be changed?

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And so you can't do

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anything other than integers.

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So for example, if I try and do a step of
0.5, it will default to an integer value.

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So just be aware of that

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and then I'm going to click on Save.

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Now all we need to do
is link that to our relative field.

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So a field on our actual template itself.

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So we could actually make this
so that it's driving the text

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in a particular field.

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For example, however, we will link it
to the font size in this case.

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So if I click on one of my text frames

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and go over to the Properties tab,
the first thing you need to do

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is make sure that the text frame you've
selected is enabled.

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That makes it dynamic and can

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then be driven from Invent.

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Now one of the options we have
as part of a text frame, if I look down

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this list a little bit,
is the selection of a font size.

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Now by default you'll probably see
this is set to inherit,

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so it's just going to inherit
what's already on the document.

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However,
in this case we can link it to a variable

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and then it
will show as a list of relevant variables.

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So in this case it's just the ones
which allow a numerical input.

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So I can say number variable example

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and that's it, that's the link.

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Then create created.

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So now export this template
as a MEX file

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and I'll import this
into our MegaEdit product.

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So with our product loaded up, we can now
see that we have one variable option

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available in our form on the right hand
side, which is a numbers selector.

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And when we change this value either by
typing in the new value or choosing these

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icons over on the right hand side,
you'll see that the linked field,

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the font size being utilized, changes.

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And we can't go outside of the ranges
that we've specified.

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If I type in something that's outside
of those ranges, you'll see that

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we get our associated
validation warning message.