The standard provides guidelines for lettering and text in technical drawings, including:
For those seeking additional information on technical drawing and AS 1100.101 1992, there are several resources available: AS 1100.101 1992 Technical drawing General principles.pdf
Here is the reality: modern software does not generate "correct" drawings automatically. The computer draws lines where you tell it to. If you do not understand , your digital drawing will be a mess. The standard provides guidelines for lettering and text
The scale is the ratio of the size of the drawn object to its real size. AS 1100.101 1992 Technical drawing General principles.pdf
Before computers, draftsmen wrote by hand. AS 1100.101 mandates that all lettering must be letters using the 'ISO' gothic font. No script, no italics, no lowercase.