How to Change Page Title

Step 1: Go to Pages > All Pages. Then point at the page you want to edit. You will see the Quick Edit option.

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Step 2: Edit the title as you want. Delete the current slug. Then hit Update. It will automatically generate new slug for your page.

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You can also edit some other options such as parent, template, status... If you want to edit more options, hit Edit instead of Quick Edit.