Recognising labels

Decides what fxRender accepts as the name of a value when it searches the cells around a formula — which is what turns B1 into Radius.

The five rules

Any number of these can be on at once. The search stops at the first cell that qualifies, so turning several on widens what will be found rather than narrowing it.

Bold text — on by default: A cell formatted bold is a label. The usual way of writing a heading over a column of numbers.
Italic text: The same for italics. Worth turning on where bold already means something else on the sheet, such as totals.
Ends with an operator: Text finishing in an operator — x = — is a label. Suits a sheet written out as a worked calculation, where each line names what it produces.
Ends with a character: Text finishing in a character of your choosing, : by default, so Radius: is a label.
First non-numeric value — on by default: With nothing else to go on, take the first cell along the row or column that is not a number. Finds names on sheets carrying no special formatting at all, at the cost of occasionally picking up text never meant as a heading.

How the search runs

A workbook name wins outright. If the cell has one, no searching happens.
Otherwise the search steps left along the row and up the column, stepping over numbers, and stops at the first cell that qualifies or at a blank.
Where a cell sits in a table it takes a label from both directions, and the two combine.
Where a label heads a run of several values the name carries an index — Revenue₁, Revenue₂. A label with a single value beside it gets none.

Brackets in a label

A label often says more than the name. Length [m] gives the unit the value is in; Length (α) gives the symbol to draw in the equation instead of the word. Which bracket means which is your own convention, so each kind is given one meaning rather than fxRender guessing per label.

Short variable name: What is inside is drawn in place of the whole label. Length (α) is a cell called Length on the sheet and α in the equation. Written as LaTeX — \alpha — it is typeset; see LaTeX in a label.
Unit name: What is inside is the unit, and is shown by Display Units rather than as part of the name.
Ignore: Dropped: neither name nor unit. For an aside meant only for whoever reads the sheet — Length (draft) is a cell called Length.
Part of the name: Kept, brackets and all. Length (m) names the variable exactly that.

By default ( ) holds the short variable name and [ ] the unit. A comma does the same job as a short-name bracket without the brackets — Length, α — and has a switch of its own, since it competes with neither.

Label	Setting	Name	Unit
`Length [m]`	the defaults	Length	m
`Length (\alpha)`	the defaults	α	—
`Length [m] (\alpha)`	the defaults	α	m
`Length, \alpha`	the defaults	α	—
`Length (m)`	( ) as unit name	Length	m
`Length (draft)`	( ) as ignore	Length	—
`Length (m)`	( ) as part of the name	Length (m)	—

Both brackets can be given the same meaning if that suits the sheet; what cannot happen is one bracket meaning two things.

If Name shows cell references

No label was recognised. Make the heading bold, end it with your chosen character, or give the cell a workbook name — and check the rules above.

Find these under Settings → Recognising labels and Settings → Brackets in a label, at the foot of the panel.