New entities are created in the XY-plane of the current coordinate system. By default, this is the World Coordinate System (WCS). All dimensions in a DWG file are expressed in drawing units (DU). The INSUNITS (Insertion Units) system variable sets the value of 1 DU.
For new drawings, INSUNITS is defined in the template drawing that you selected to create the drawing. BricsCAD provides a series of Template Drawings for decimal and imperial units.
To draw accurately, BricsCAD provides several drawing aids:
- Entity Snaps allow you to use keypoints on existing 2D entities such as endpoint, midpoint or center and the intersection. Entity snaps also allow you to draw perpendicularly, parallel or tangentially to an entity.
- 3D Entity Snaps allow you to use keypoints on 3D entities such as solids.
Dynamic dimensions: When dynamic dimensions are switched ON, you can enter distances and angles in dynamic dimension fields . When multiple dynamic dimension fields display, for example when drawing a rectangle, press the Tab key to switch to the next field. When you enter a value and press the Tab key, the field turns red, which indicates that the value is fixed.
- Polar Tracking forces the drawing direction to specified angles with respect to the axes (X, Y, Z) of the current coordinate system.
- Entity Snap Tracking combines entity snaps and polar tracking.
- Coordinate Input: allows you to enter xyz coordinates to specify points.
- Snap and Grid: A grid is a set of evenly spaced lines or dots that serve as a visual distance reference. The cursor snaps to the grid points, which allows you to draw fast at fixed intervals.
- Drawing Limits allows you to limit the drawing area, which prevents entity creation outside the drawing limits.
- Ortho Mode forces the cursor to move parallel to either the X- or Y-axis of the current coordinate system.
- User Coordinate Systems: you can define named user coordinate systems (UCS) located anywhere in three-dimensional space. You can restore a named UCS at any time.
- Direct Distance Entry allows you to enter lengths, radii, diameters and movement vectors.
- Nearest Distance allows you to dynamically view and modify the distance between two selected entities or sub entities.
- Manipulator is a versatile grip tool to swiftly move, rotate, scale and mirror selected entities.