Docs Search the docs
  1. Docs
  2. Symbols and the Toolbox

Parameters, Types and formulas

Give a dimension-driven symbol its sizes, and work one value out from another.

  • How-to
  • 2 min
  • Pro
  • Checked with Fluah 1.0.34

Where to find it

Edit toolParameters

Steps

  1. In the tool's tab, click Parameters.

    Parameters open beside the tool: Type Standard, Width 1800 and Depth 400, both Instance

  2. Click New for a new Type. Type its name and press Enter.

    A new Type, MSB typed as its name

  3. Type the Type's values. The drawing follows.

    MSB: Width 2400, Depth 600, and the drawing at that size

  4. Click Instance to make a parameter a Type one.

    Width Instance, Depth switched to Type
    A Type value is the same on every copy of that Type. An Instance value can differ on each copy, and has handles on the sheet.

  5. A Formula works a value out from others. The Downlight's Right is Width/2.

    The Downlight: Right, Left, Front and Back each worked out by a formula, Width/2 or Depth/2, a green dot by each
    A green dot means the formula is working.

  6. Click Done. Pick the Type in the tool's properties as you place it.

    Switchboard in hand: its Type list open, Standard and MSB

What’s next

Was this page helpful?

Updated 6 November 2026