Click the symbol button in the lower right corner. You can slide on the left side of the symbol bar, select the type of input symbol, and select the small lock in the lower left corner of the screen to input symbols all the time. When the symbol input is finished, click Back to re-enter the text.
Download the input method, and after installation, enter it directly with the mobile phone keyboard.
Enter any input interface of the mobile phone, and the mobile phone input method interface will pop up. In the input method interface, click the symbol icon at the lower right. Serial number column found in symbol column. If Roman numerals are found, you can directly enter Roman numeral symbols.
Input step: Click sogou input method to customize the input method of the status bar. Click the third of the four icons that pop up, which is the special symbol. In the new pop-up dialog box, select the numerical serial number. Select the digital serial number you need.
Open the phone, click the position where you need to input the arrow symbol, and bring up the input method panel. After opening the input method panel, click the "symbol" key in the panel. After opening the symbol list, find the special symbol classification and click Enter.