Numeric field type allow only to use integer (this is equal to input[type=number] in HTML5).

To make this the best way is to use text field type and set parameter "Format Allowed" to Decimal (see screenshot)

I saw that in the text field option. Would it make sense to make it available in the number field as well? Or what do you see the number field actually being used for?

Is there a way to switch a field type once it's created—such as from Number to Text?

No sorry, each field have a own DB structure.

When using Number on a text field, what does STEP control then?

[*] To make this the best way is to use text field type and set parameter "Format Allowed" to Decimal (see screenshot)

I tried this and get the error 'Invalid Field'

Hi,

When using Number on a text field, what does STEP control then?

In according with Number HTML5 the step attribute allow you to choose increment when you use +/- buttons, see screenshot 1

docs at https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/number

To make this the best way is to use text field type and set parameter "Format Allowed" to Decimal (see screenshot)

Missing Screenshot, anyway "Decimal" use regular expression like "[0-9]+[,]*[0-9]*" (so it uses "," as separator between integer and decimal numbers). If you want use "." char then you can fill details like screenshot 2

Thank you—it works.