---
title: "Properties Editing"
description: "Arithmetic expressions in numeric fields and step control."
canonical_url: "https://www.softellion.com/en/docs/spectrum/math-inputs"
---

> Index of every page on this site: [llms.txt](https://www.softellion.com/llms.txt)

<section-md>

Every numeric field in the app — the transform values in the **Properties** panel (Translation, Rotation, Scale) and numeric settings — accepts arithmetic expressions, not just plain numbers. Type an expression, press <kbd>

Enter

</kbd>

 (or click elsewhere), and the field collapses it into the result.

![Video: Properties panel editing values](https://www.softellion.com/video/docs/spectrum/edit-properties.webm)

## What you can type

<table>
<thead>
  <tr>
    <th>
      Example
    </th>
    
    <th>
      Result
    </th>
  </tr>
</thead>

<tbody>
  <tr>
    <td>
      <code>
        2*3+1
      </code>
    </td>
    
    <td>
      <code>
        7
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        1/3
      </code>
    </td>
    
    <td>
      <code>
        0.333333333333333
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        2*pi
      </code>
    </td>
    
    <td>
      <code>
        6.283185307179586
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        2^10
      </code>
    </td>
    
    <td>
      <code>
        1024
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        (1+2)*4
      </code>
    </td>
    
    <td>
      <code>
        12
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        sin(30)
      </code>
      
       (degrees)
    </td>
    
    <td>
      <code>
        0.5
      </code>
    </td>
  </tr>
  
  <tr>
    <td>
      <code>
        log(100)
      </code>
      
       / <code>
        ln(e)
      </code>
    </td>
    
    <td>
      <code>
        2
      </code>
      
       / <code>
        1
      </code>
    </td>
  </tr>
</tbody>
</table>

Supported: `+ - * / ^`, parentheses, the functions `sin`, `cos`, `log`, `ln` (trigonometry uses degrees), and the constants `pi` and `e`.

## Rules

- The expression is committed on <kbd>

Enter

</kbd>

 or when the field loses focus.
- An invalid expression changes nothing — the field restores its previous value.
- Results are clamped to the field's allowed range. Rotation is cyclic and wraps into 0–360°: `361` becomes `1`, `-10` becomes `350`.
- Integer fields drop the fractional part of the result.

## Adjusting without typing

- <kbd>

Arrow Up

</kbd>

 / <kbd>

Arrow Down

</kbd>

 and the <kbd>

-

</kbd>

 / <kbd>

+

</kbd>

 buttons nudge the value by the current step.
- In the Properties panel the **Unit step** selector next to each group sets that step (for example 1 or 10 for Translation, 45 or 90 for Rotation).

</section-md>

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