Fu Xin Reader provides horizontal and vertical ruler and Guide tool (click "View" > "page display" > "Ruler" and "guide"), you can help you adjust the position of text, images, or other objects on a page, or you can check the size and margins of an image.
The FU Xin Reader supports the display of PDF files in "Non-linear-width" mode. You can uncheck the line width option under the View tab to display a PDF file that displays the lines in a PDF file with a constant stroke width (1 pixels), making the graphic more intuitive and readable.
You can measure the distance of objects in a PDF document by using the measurement tool under the Notes tab.
The FU Xin Reader allows you to adjust the format of the measurement during the measurement. When measuring tools are selected, the tab bar of the reader automatically adds an annotation format contextual tab. From the Annotation Format tab, you can set the measurement scale, or you can check or uncheck the ruler, show results information, and measure marks to show or hide the appropriate options.