Use gimp to make different colors of text and background

Use gimp to make different colors of text and background-Linux general technology-Linux technology and application information. The following is a detailed description. I haven't updated my post since I posted it. On the contrary, the PK of beautiful brother and Uncle Xiang Bo is getting better and better. I'm sorry for your support. I wanted to build a foundation. After so long, I decided to make a practical application first.
It is often seen in newspapers that a text is followed by a background. if the background is black, the text is white, the background is white, and the text is black. I don't know how typographical software makes this effect. Fortunately, there is a powerful GIMP that can be used. I don't know what the term of this effect is in image processing. Please tell me if you know it. I changed the title.

There is a lot of inconvenience in accessing the Internet through mobile phones. I can't re-print the pictures. Let's see it in order.
Open the image to be processed, which is now called a background layer. Enter the required text. In order to make the effect obvious, the text is bold and No. 300 (for modifying the font and font size attributes, PS is under the menu bar, and gimp may be in the lower left corner, I said it is possible, does not rule out the possibility of your personality );

Select a text layer (it must be a text layer, otherwise it is invalid), use the "select by color tool", select the text, and press "del" on the keyboard to delete the text color, in this way, the text is transparent and the selection area is retained (by the way, there is a "text selection tool" in PS, not in gimp, but it doesn't matter, in this case, right-click the text layer and select "merge layers". In this way, the text selection area is on the background layer and the color can be edited. Of course, if the text selection area is not in urgent need, you can save it as a path and restore it from the path to the selection area as needed. I will talk about it later;

"Color"-"Reversed" (you can also try the "brightness inversion" effect). In this way, the color in the Text Selection area is the opposite of the previous color,

If it is a black or white image, the effect will be better,