Hi,
Thanks for your response.
To change the text, follow the below steps
For Slider Section
Go to Dashboard >> Appearance >> Customizing >> Theme Settings >> Slider Settings >> Slider Button Text >> Here you can change slider text “Read More” >> Publish it.
For About Section
Go to Dashboard >> Appearance >> Customizing >> Theme Settings >> About Section >> Button Text >> Here you can change about us button text “Read More” >> Publish it.
Please let us know if you need any other help.
Thank You