Roslyn - Upload Logo
Navigate to Appearance > Header. Click the "Add new image" button and upload your logo.
For best results your logo should be sized at 600px wide by 300px high before uploading. Your theme is retina-ready, meaning you will be uploading a logo at double the display dimensions. Your logo will display at 300px by 150px. If you do not upload a logo image at the specified size, it might appear fuzzy or pixelated in retina displays (all newer Apple devices).