You can edit the properties of a graphic by double-clicking on it. You can also resize your graphics directly in the editor by selecting it and dragging its corners with the mouse or by double-clicking and entering a zoom factor. Although this function is primarily designed for high-resolution printing with PDF files you can use it for all your output formats whenever you need a quick resize. You may obtain slightly better quality if you resize in Impict or another graphics program, but this feature can be a great time-saver when you are in a hurry.
•You can adjust the size of graphics precisely with the Zoom % setting in the Open Image dialog. This does not physically resize the image until you publish and in PDF the full image resolution is used (see below).
•You can also edit the properties and hotspots by right-clicking on a graphic and selecting from the Picture... options in the context menu.
Note that this resize function is really for PDF printing (see the instructions for hi-res graphics and PDF below). For other output formats where the images are resized when you publish a quick algorithm for fast performance. Use it when you are in a hurry. For high-quality resizing we recommend resizing the images in a graphics program before inserting them.
•Quick resize: Just click once on the graphic to select it and resize it by dragging the resize handles displayed at the edges. It doesn't matter which handle you drag because the height and width of the graphic are always resized proportionally.
•Precise resizing: Double-click on the graphic to display the Image dialog and enter a zoom factor in percent. This also allows you to configure responsive image settings.
•Undo resize: To return the graphic to its original size just double-click on it to display the Open Image dialog and select the Autosize option.
Nothing is actually done to the image when you resize it in the Help+Manual editor. Your original source image file is not changed at all, and is never changed. Any processing is only performed on publishing. How resized images are handled on publishing depends on the output format:
WebHelp, ePUB, Kindle and eWriter: Export images with original dimensions
The images are exported with their original native dimensions when you publish to to these formats. Instead of physically resizing the image, Help+Manual simply adjusts the display size of the image. Modern browsers and eBook viewers do an excellent job of scaling and this provides much better quality for responsive images on high-resolution devices.
HTML Help/CHM: Original images or physical resizing
Help+Manual generates fully scalable pages for CHM output if you activate the setting Make CHM file compatible with high-resolution monitors in Configuration > Publishing Options > HTML Help > HTML Export Options. Then the original images are exported in exactly the same way as for WebHelp, along with a scaling setting. If you turn this option off the images are physically resized to the target dimensions during the publishing process.
PDF and DOCX: Export images with original dimensions
Images exported to these formats are handled in the same way as WebHelp. The image is exported with its full original dimensions along with a scaling command that controls its display dimensions on the page, in accordance with your image dimensions settings. Here too, this gives you better quality for zooming and printing if you insert an image with native dimensions larger than those of the display dimensions.
When you print PDF or DOCX files or view them at above 100% graphics can look "blocky" and "jaggy". You can solve this problem by using larger graphics and resizing them in the Help+Manual editor. Since the images are exported with their original dimensions they then have enough "reserve resolution" for better quality display on high-resolution devices and printers.
For the best possible resize quality when using native image dimensions rather than responsive images you can also resize your graphics files physically. You can do this with your own favorite graphics editor, or with Impict, the screenshot enhancement and graphics editor included with Help+Manual, or with any other graphics editor.
However, with the increasing use of high-resolution devices this method is no longer as useful as it used to be. Generally, it is now almost always better to insert larger responsive images that will give you better display quality on these modern devices.
•To edit a graphic in Impict just click on the graphic in the editor to select it and then select Image Editor in Project > Tools.
•To resize the image in Impict right-click on it, select Edit Properties and then select Quality Resize.
•After saving the new version in Impict (don't change the filename or location) just select another topic briefly in Help+Manual and then return to the current topic to reload the topic with the modified graphic.