Below is a photo of my websites current homepage, with some information redacted for privacy purposes.
As you can see, this is the ride theme with a slideshow on my homepage. For some reason, the buttons and subtext are somewhat transparent. I have searched through “edit code” and the slideshow.liquid but was unable to find anything relating to the opacity of the text/button.
Did you try to change the color because most likely text isn’t transparent, its color is gray. There might not even be a theme which changes text opacity but changing color to gray is common which might look to you like opacity is low.
Ohh that I didn’t notice. Then the opacity option can be on 3 places. Of the slider itself, there can be an option to change the button type.
2: at colors section. There can an option to change opacity there
3: at typography section.
If it isn’t available at all of these places then you will have to send the url of your shopify store and if preview password is still enabled then that password as well, and I will check if I can help you changing it through code