Scale systems, calibration, zones, and ignore colours — everything that turns drawing-units into real-world measurements.
9 articles
The scale system
How ZeroCount converts drawing-pixels into real-world distances — the scale system, scale presets, and the metric / architectural switch.
Updated 13 May 2026
Calibrating a drawing
How to set a drawing's scale by measuring a known distance on it — the most accurate way to set the scale.
Scale presets
The full list of built-in scale presets — metric and architectural — and how to pick the right one.
Linear and area scale (per-group)
How Linear and Area marker groups can have their own scale that overrides the drawing default, and when you'd want that.
Unit width
The width property on Unit (Count Symbol) groups — what it controls and when to change it.
AOIs and zones — the difference
AOIs and zones both produce polygons on a drawing, but they do completely different jobs. This article clears up which to use when.
Zones
Drawing zones to split your Excel export by room, area, or floor — and managing them through the Zones & AOIs panel.
Ignore Colours
Tell ZeroCount to skip specific colours on the drawing — useful when shading, hatching, or background fills confuse detection.
Ignore colour groups
How ignored colours are grouped, what a colour group represents, and how to manage them as a set rather than one swatch at a time.
