You're looking for a free trial of Photoshop CS4 with full features. Here are a few options:
Although Photoshop CS4 is an older version, you can still access it through Adobe Creative Cloud. If you sign up for a free trial of Creative Cloud, you'll get access to Photoshop CS4 and other Creative Cloud apps. The free trial typically lasts for 7 days, but you can try Photoshop CS4 and other apps during that period. photoshop cs4 free trial
Adobe offers a free trial of Photoshop CS4 through their website. You can sign up for a free trial and download the software. The trial period usually lasts for 30 days. You'll need to provide some basic information like your name, email address, and country. You're looking for a free trial of Photoshop