In the right section you can change the settings for the Legend, the text of the
dimension line. You can use the Text position choices to change the location of the
text – but only if one or both of the AutoVertical and AutoHorizontal checkboxes are
unchecked. Use the various options on the Text and Alignment tabs to further change
the text format.
Calculation of dimensions always takes into account the scale and dimension units
contained in Tools > Options > Draw > General. If you set a scale of 1:10 and a
unit of centimeter, then a 6 cm long object in the drawing will be shown with a
dimension of 60 cm when the option Show meas. unit is activated and the selection
window is set to Automatic. Deselecting this option turns off the display of units. You
can change the units displayed from Centimeters to (for example) Millimeters by
choosing Millimeter instead of Automatic in the selection window.
Adjust the font type and size for the text of a dimension line by means of the Text tab.
The Standard button at the bottom of the dialog sets all the properties of the
dimension line to the (inherited) standard properties of the style.
Note
The dimensioning style Dimension Line is always linked and stored with
the current work page. All the changes that you make apply only to this
page. New drawings are started with the standard properties of Draw.
If you want to use the amended style for future drawings, save the page
as an additional template.
Dimensioning objects
In this exercise you will dimension some logic blocks (see Figure 229). They are used
here to demonstrate the technique; you can use your own drawing or fetch a picture
from the Gallery.
So that Draw can clearly recognize the edges to be measured, you should set a
number of guide lines delineating the edges. The previous sections explain how to do
this. To place the guide lines exactly and easily, change the resolution of the Grid.
Suitable values for this work are a resolution of 5 mm and a subdivision of 4 points.
With this setting you should have a snap to grid function with 1 mm point separation.
We will begin by dimensioning the NOT gate. For this block we want the total width
(18 mm) and the width of the block itself (8 mm) to have dimension lines. The first
step is to add guide lines to delimit the dimension lines. With Snap to grid activated,
you can position these quite accurately (see Figure 230a). Be sure that the function
Snap to guide lines is active and zoom in to the part of the block to be dimensioned.
The block should not be selected.
Chapter 10 Advanced Draw Techniques 181
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