When it comes to 2D drawing software, the first thing that comes in our mind is AutoCAD. AutoCAD played an important role in popularising computer-aided design (CAD). Till today, when it comes to 2D drafting and architecture planning, AutoCAD holds the top position in the industry.
Use the snap feature to attach the entities properly.
If you are drawing a large part, you can enable the grid option.
Create BLOCKS for frequently used shapes.
If you are designing a sheetmetal part like the one on this page, you can use coordinate dimensioning instead of linear dimensioning.
Create your custom one letter shortcuts for frequently used commands.