Modify Banner Image
Step 1
Go to Magento admin pages through
Admin -> CMS -> Pages -> Edit home(Which mentioned in URL key)
Step 2
After click the home page which redirected to edit page.
In home edit page, go through the Content tab in left panel, click the tab.
Step 3
You see the textarea with the HTML code, in that you find the block id "home-slider".
You will change the home page banner images in the textarea.