Update README.md

README.md

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 ### sdxl-0.9-usage
 
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 -  This repo is a tutoral intended to help beginners to use the new released model, stable-diffusion-xl-0.9 in ComfyUI, with both base model and refiner to achieve a magnificent quality of image generation.
 
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 ### Usage
 
 -  1. Go to Github and find the latest version of ComfyUI, which is a cutting-edge GUI platform for you to use all kinds of diffusion models.
@@ -49,7 +52,7 @@ tags:
       Link: https://huggingface.co/NathMath/sdxl-0.9-usage/tree/main
       
 
-   5. When you have loaded into the ComfyUI, it will show this default interface shown below:
+   5. When you have loaded into the ComfyUI, it will display this default interface shown below:
       ![sdxl-step51.png](https://cdn-uploads.huggingface.co/production/uploads/637a0b3f3f8f451d6bd1fd6d/MzYMjETypErLy9Gab2G2x.png)
       
       Then, find out the "load" button on a floating panel, click, and choose the ".json" file download from THIS REPO, it will quickly load a friendly interface to use the stable-diffusion-xl-0.9 series.
@@ -61,19 +64,24 @@ tags:
       Note that it will automatically save TWO images of EACH queue, respectively before applying with the refiner, and after.
 
 
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    !  Congratulations, you have sucessfully learned how to use sdxl with FULL MODELS.
 
 
 
 ### Tips
 
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+-  Positive prompts and Negative prompts in both input box are ought to be identical, but you can freely try whatever you want.
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+-  The output quality of the stable-diffusion-xl-0.9 models depends on your prompts and parameter settings, so try to adjust them to achieve a better quality.
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 -  Need to be updated...
 
   
 
 ### Q&A
 
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 -  Please feel free to leave all of your questions in the community of this repo, and I will soon answer them if I am able to solve them out.