how to change the font size of PS design posters

how to change the font size of PS design posters? 1. On the canvas, click the right mouse button on the title, then select a color option in the stroke bar, then click the right mouse button on the picture, and put the mouse directly below the picture, then drag the mouse and click OK. 2. After opening the file, create a new layer, set the background color as black, the size as 31 points, and the color as white. Select the context menu of the file menu and select image tracing. 3. Click Filter-Blur-Gaussian Blur in the menu to adapt to some special effects of graphics. 4. Double-click the shape layer and select Fill Layer. Import a new layer into a picture. 5. Press ctrl key to click on the image layer, select Layer-New Adjustment Layer, select Black and White Adjustment Layer, and add a stroke effect. The stroke spectrum layer will be described as follows. What is the minimum font size for a poster of A2 size with ps?

the poster with the size of p>A2 is relatively large. If there are not many words in the picture, the words should not be too small (if there are many words, the whole text should not be smaller than No.24). What do you think is the minimum font size to read clearly? Which side should I look at, the computer display or the printed product? 61*81cm poster, what number is commonly used for copywriting?

For such a big poster, the text font No.7-No.9 is the most suitable, and it should not exceed No.11, otherwise it will be ugly. Slogan is hard to say, but it's better to be within 21.