First of all, this text glows with blue light flashing effect - it can be found in the subtitles special effect - stay special effect - text glowing and flashing in Love Editing.

Then in the video preview area in the upper right corner, double-click the mouse to open the text editing window, enter the text, and after confirmation, the text will appear in the video preview area. Under the condition that the subtitles are selected, You can check the box on the left - Text flashes blue to form a text effect.