# Calculation Areas

This section describes how to use calculation areas.

Calculation areas determine where illuminance levels will be calculated on the drawing. The illuminance levels are based upon the light fixtures and solids inserted on the drawing.

## 📄️ Insert Calculation Area

The Insert Calculation Area command is used to insert a flat area on the drawing where illuminance levels are to be calculated.

## 📄️ Insert Sloped Calculation Area

The Insert Sloped Calculation Area command is used to insert a sloped area on the drawing where illuminance levels are to be calculated.

## 📄️ Insert Calculation Line

The Insert Calculation Line command is used to insert a line on the drawing where illuminance levels are to be calculated.

## 📄️ Insert Sloped Calculation Line

The Insert Sloped Calculation Line command is used to insert a sloped line on the drawing where illuminance levels are to be calculated.

## 📄️ Insert Mask

The Insert Mask command is used to define an area in a calculation area where the illuminance values should not be calculated.

## 🗃️ Calculation Area Groups

3 items

## 🗃️ Calculation Schedules

3 items