Center Radius Measurement
The Center Radius measurement tool places specialized markups that calculate the radius a circle based on the position of the circle's center and one point on its circumference.
Before placing a measurement, it is recommended that you set the page scale for the document first. When trying to place a measurement on a page that does not have a page scale, you will be prompted to set the scale.
- Go to Tools > Measure > Center Radius or press SHIFT+
ALT+U. The Center Radius measurement mode is engaged.
- Alternatively, click Center Radius on the Measurements panel.
Note: The keyboard shortcut for the radius measurement tool automatically calls the most recently used version of the tool, either this one or the Three-Point Radius Measurement tool.
Measurements can be taken in units different from those used to set the page scale. To change the units used for a specific measurement dimension, go to the Measurement Properties section of the Measurements panel and select the desired measurement units from the available dimension dropdown lists.
- Any or all of these can also be set from the Units dropdown menu on the Properties toolbar.
Note: When changes are made to one or more of these properties before placing the measurement, they will persist until a different action is initiated (for example, placing a different type of measurement). This makes placing several measurements with the same properties easier. Keep in mind that all of these properties can be changed for specific measurements after they are placed; see Tips below.
- In the document, click to define the center of the circle.
To draw a full circle, simply clickon 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.
- 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.
If the page scale has been set, a preview of key measurement values will appear in the lower-right corner of the drawing as you place measurements to help ensure precision. You can hide this preview window by clicking the X to its left. When minimized, the preview window is replaced with a measure icon; click this icon to recall the measurement values preview window. Note that you can hide and recall this preview window while placing a measurement.
- When drawing an arc, Revu 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.
- Several measurement properties can be changed after the measurement has been placed, including Subject, Label, units of measure, and any applicable optional dimensions like Slope or Depth. Click a measurement so it is active and go to the Measurement Properties section on the Measurements panel to view and change any of these for the selected markup.
To remove markups from a PDF, select the markup or markups on the PDF or from the Markups list and do one of the following:
- Press DELETE on the keyboard.
- Right-click and select Delete.
You can add an action to nearly any markup. Simply right-click the markup and select Edit Action to open the Action dialog box.
Markups might present with one or more of several indicator icons alerting users of certain conditions or attachments. These icon indicators appear below the markup to the right (or, in the case of grouped markups, below and to the right of the group) and include:
Action: Indicates that an action has been defined for this markup. Clicking this icon triggers the action.
Capture: Indicates that the markup has an embedded media, typically an image or video. Clicking this icon opens a preview window showing the embedded media (or first piece of media, if multiple are embedded) and provides easy access to several useful tools.
Reply: Indicates the existence of one or more replies to the markup in the Markups list. Hovering over the icon previews the replies and clicking it opens the Markups list (if it's not already open) and jumps directly to the markup's entry there. Users can turn off the ability to see reply indicators in the View menu.
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 panel.
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 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
To change the appearance of a Radius measurement, select it and click the Properties panel.
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 opacity level of the line and endpoints, from 0 (invisible) to 100 (opaque).
Fill Opacity: Sets the fill
Line Width: Sets the line thickness in points. A setting of 0 effectively renders the line invisible.
Style: Determines the line pattern.
Show Caption: Select to include caption text on the markup. Click Edit to choose which measurements to include.
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.
- 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, Revu 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.
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.