Center Radius Measurement

1. Go to Radius > Center Radius on the Measurements tab or press SHIFT+ALT+U. The Center Radius measurement mode is engaged.

   Note: The keyboard shortcut for the radius measurement tool actually calls the most recently used radius measurement tool, either this one or the Three-Point Radius Measurement tool.

2. Click to define the center of the circle.
3. To draw a full circle, simply click on any point along the circumference of the circle. Note that as the cursor is moved away from the center point that the radius is drawn.
4. To draw just a section of the circle (an arc), click on the first point along the desired arc and, while holding down the mouse button, drag along the arc and release at the second point.
   • Hold down SHIFT while describing the arc to automatically draw it in 45° increments.

Tips:

• When drawing an arc, Vu will automatically prevent it from being larger than 180° (a semi-circle); an attempt to draw a larger arc will result in the arc flipping on its axis. For an arc larger than 180°, either resize the Center Radius measurement after it's drawn or use the Three-Point Radius Measurement tool.
• Hold CTRL and click and drag a markup that has already been placed to automatically make a copy of it.

Select a markup to reveal its control handles. Each handle controls a different aspect of the markup's size and orientation.

To rotate the markup, click and drag the orange handle outside the markup (when the markup is first placed, it will be at the top). By default, the markup is rotated in increments of 15°; to rotate in increments of 1°, hold down SHIFT while dragging.

The rotation can also be entered in the Rotation field found in the Layout section of the Properties tab.

To rotate the caption, click and drag the orange handle directly over it. By default, the markup is rotated in increments of 15°; to rotate in increments of 1°, hold down SHIFT while dragging.To return a rotated caption to its original position, right-click it and select Reset Caption Position.

To change the size of the arc, click and drag one of the yellow handles on the markup's circumference.

• Holding down SHIFT while doing so will change the arc in increments of 15°.

To change the length of the radius, click and drag the yellow handle at the circle's center.

To move the entire markup together, click and drag a part of it other than the control handles.

To scale the markup up or down, click and drag the appropriate purple handle.

See Editing Markups for more information.

The appearance of the Radius measurement is configurable, including line and fill color, hatch pattern, line width and style, opacity, plus the font style of the caption and whether or not to show it.

To change the appearance of a Radius measurement, select it and click the Properties tab.Go to View > Tabs > Properties or press ALT+P to show the Properties tab if it is hidden.

Appearance Properties

Color: Sets the line color.

Fill Color: Sets a fill color.

Highlight: Makes the fill color and/or hatch pattern transparent so underlying content shows through.

Hatch: Sets a hatch pattern. The associated color selector sets the line color of the hatch pattern.

Scale: Sets the scale of the hatch pattern, from 50 (half the default scale) to 200 (twice the default scale).

Opacity: Sets the line opacity, from 0 (invisible) to 100 (opaque).

Fill Opacity: Sets the fill and hatch pattern opacity, from 0 (invisible) to 100 (opaque).

Line Width: Sets the thickness (in points) of the line. A setting of 0 effectively renders the line invisible.

Style: Determines the line pattern.

Show Centroid: Select to show the geometric center of the shape. If necessary, the caption will be automatically adjusted to be below the centroid.

Font: Sets the font used for the selected text. Available fonts are divided into three regions:

• The first region shows all fonts used in the currently selected text element.
• The second region lists the standard PDF fonts that are supported by all PDF viewers. These fonts do not need to be embedded in the PDF when used, thereby cutting down on file size.
• The third shows all other available fonts. When used, these fonts need to be embedded in the PDF.

Note: If you attempt to embed a font for which the viewing and editing permissions do not allow formatting, Vu will display a message indicating the font will not be embedded in the PDF.

Font parameters are retained in the PDF such that even if the original font is not embedded or on the viewer's workstation, a suitable representation of the font will be substituted.

Font Size: Sets the size of the font. While the list shows sizes ranging from 2 to 72, font sizes between 1 to 144 points are supported; just enter the desired size manually. Also, values with up to one digit after the decimal point can be used.

Text Color: Sets the color of text.

Font Style: These settings control the formatting of the text. Options include Bold, Italic, Underline, and Strikethrough. Generally, any combination of these styles can be applied to format the text.