Templates are mainly used for engineering drawings and templates are also called frames. These are providing the information about engineering drawing.
Templates are used as a standard sizes and custom sizes in the drafting. In few causes templates are designed according to the engineering drawings.
Designing of drawing templates are followed by the engineering standards. In these frame border lines are should be maintain with darkness.
These frame is designed as a blocks type by horizontal lines and vertical lines end to end with standard distance. These empty blocks are filled with alphabets and numerical words.
The light thickness of lines are appearing in the frame border only in the drawing area lines are disappearing.
This case mostly used when understanding the manufacturing drawing may be in that having any typically identified part of details.
Designers are mentioned there typical part of details in this area.The alphabets and numerical words are helps to find the particular part.