Dry erase or wet erase markers and even glass marking pencils are commonly used for writing on glass for temporary writing.
You can buy dry erase glass markers that are made specifically for writing on glass surfaces such as those made by Expo, Quartet or Sanford or even glass markers or glassboard markers from brands such as Sharpie, Faber Castell or even Staedtler.
If you want the writing on the glass to be more long lasting you can use an acrylic paint pen or permanent marker on the glass.
Before writing on the glass make sure the glass is clean and dry and wash it off with some soap and warm water and allow it to dry and have a clean surface.
A glass marking pencil is a specialized pencil that is designed for marking glass.
Glass marking pencils are designed and made so that they are able to to leave visible and temporary marks on glass and other non porous surfaces such as ceramics, metal and plastic.
A glass marking pencil often uses soft, water soluble lead which is easy to remove from the glass or surface with a dry cloth or a damp cloth.
The lead in a glass marking pencil is made to be easily wiped away, which makes the glass marking pencil ideal for temporary markings, labeling, measurements or marking lines for cutting.
The glass marking pencils also often come in bright colors including yellow and white which helps to ensure that the markings on the glass area easily visible.
Glass marking pencils are commonly used in glass cutting, glass art, labeling and also general marking tasks on non porous surfaces.
A glass marking pencil is not meant for permanent markings and is only made and meant for temporary markings.
Glass marking pencils can be used on all types of glass.