First, you need to click on the text and the logo.
You use your mouse to click on the percentage button that is next to the text color. Here in the above image, that is the “98%” small button.
After you click on the button, there will be a color picker for you to change the color properties. Please look at the image below and you will see that there is a small bar. The bar is used to change the opacity of text. You can move to change the opacity value as you want.
You can change the opacity of logos by changing the value in the opacity small bar. You use and hold the left click to move and change the opacity value.