Red Flag Linux Desktop 6.0 user manual: Utilities

7.5.1 Science Calculator

Kcalc is based on KDE's simple and http://www.aliyun.com/zixun/aggregation/17547.html "> powerful science calculator. It provides a number of mathematical functions. It is worth noting that, in addition to the common functional functions that most scientific calculators have, Kcalc has the following series of special features, such as providing trigonometric and statistical computations; allowing the cutting and pasting of numbers from the panel; You can easily view and use previous results. You can set the display color and font.

Open System Main Menu, select "Utility" → "Scientific calculator", Carry on scientific calculation work.

Science Calculator

7.5.2 screen size and rotation

Krandrtray is used to adjust the screen resolution, orientation, and refresh rate of the KDE desktop. Open the System main menu and select utility → screen size and rotation. At this point, the icon appears in the system tray, click the tray icon, which appears as shown below

The menu shown in.

Screen size and rotation

The menu shows all the options supported by the current hardware configuration. If the current hardware configuration allows you to change the following options: Screen size, orientation, and refresh rate, you can change the display by clicking the appropriate option.