The drawing parameters can be collectively set using a style.

Drawing styles in Marvin include the setting of the following attributes:

Size settings
Bond length
Wireframe bond thickness	Sets the width of all bonds and lines.
Bold bond width	Sets the width of the line used when bold bond is drawn. The end of the wedge bonds is 1.5 times the bold width.
Bond spacing	Sets the distance between the lines in double or triple bonds.
Hash spacing	Sets the spacing between the hashed lines for 'single down' wedged bonds and hashed bonds.
Margin	Sets the space surrounding the bundle rectangle.

Measurement unit

The measurement unit can be customized using the 'Document Unit' drop-down list.

You can use

Drawing settings