diff --git a/md/5_writing_ops/dev_attachments/dev_attachments.md b/md/5_writing_ops/dev_attachments/dev_attachments.md
index 2a970fe..7db47e6 100644
--- a/md/5_writing_ops/dev_attachments/dev_attachments.md
+++ b/md/5_writing_ops/dev_attachments/dev_attachments.md
@@ -1,6 +1,6 @@
# Creating Attachments
-Attachments are files that can be created and read as a string in the op they are attached to.
+Attachments are files that can be created and read as a string in the op they are attached to.
An attachment file can be created by clicking on an op and then clicking the create button
@@ -40,4 +40,4 @@ The attachment can now be accessed inside of your op, select the op and press 'e
-
+
diff --git a/md/5_writing_ops/dev_attachments/img/output_attachment.PNG b/md/5_writing_ops/dev_attachments/img/output_attachment.png
similarity index 100%
rename from md/5_writing_ops/dev_attachments/img/output_attachment.PNG
rename to md/5_writing_ops/dev_attachments/img/output_attachment.png
diff --git a/md/5_writing_ops/dev_callbacks/dev_callbacks.md b/md/5_writing_ops/dev_callbacks/dev_callbacks.md
index a561885..c6cab65 100644
--- a/md/5_writing_ops/dev_callbacks/dev_callbacks.md
+++ b/md/5_writing_ops/dev_callbacks/dev_callbacks.md
@@ -68,7 +68,7 @@ When you inspect existing ops by pressing the `View Code` button in the op param
op init is done asynchronously and most of the time it's better to just initalize outside of callbacks and handle port-value-changes in
the corresponding `onChange`;
-Please be aware that this function will be called twice on patch load. If you need to initialize a variable global to the op,
+Please be aware that this function will be called twice on patch load. If you need to initialize a variable global to the op,
you might be better off doing that outside of any callback. If you do this in `init`, create a variable, set them null and check for that.
```javascript
@@ -82,8 +82,8 @@ op.init = function()
### onLoaded
-Gets called when the whole patch is loaded / all ops are linked / all external libraries loaded etc.
-You normally won't need this, as op-specific init-code can just be put in your op-code without a callback.
+Gets called when the whole patch is loaded / all ops are linked / all external libraries loaded etc.
+You normally won't need this, as op-specific init-code can just be put in your op-code without a callback.
`op.onLoaded` is **not** called when the op has just been added to the patch, only when the patch is loaded.
```javascript
@@ -117,7 +117,7 @@ The number in the last part of the function defines what kind of error is shown
1 - warning / orange color
2 - error / red color / this will also place a red dot on the right hand side of the op
-
+
example code to show an error:
```javascript
diff --git a/md/5_writing_ops/dev_callbacks/img/dev_callbacks_error_UI_example.png b/md/5_writing_ops/dev_callbacks/img/dev_callbacks_error_ui_example.png
similarity index 100%
rename from md/5_writing_ops/dev_callbacks/img/dev_callbacks_error_UI_example.png
rename to md/5_writing_ops/dev_callbacks/img/dev_callbacks_error_ui_example.png
diff --git a/md/5_writing_ops/dev_hello_op/dev_hello_op.md b/md/5_writing_ops/dev_hello_op/dev_hello_op.md
index 4b20952..c7db47b 100644
--- a/md/5_writing_ops/dev_hello_op/dev_hello_op.md
+++ b/md/5_writing_ops/dev_hello_op/dev_hello_op.md
@@ -30,7 +30,7 @@ In this example we will just forward the input value to an out-port. So let’s
const myOutPort = op.outNumber("Output");
```
-In the top of the editor window click on `Save` the new code will then be executed, now reload the patch (the browser window) by pressing `cmd + r`.
+In the top of the editor window click on `Save` the new code will then be executed, now reload the patch (the browser window) by pressing `cmd + r`.
Now click on `Op` —> `Add` (or use the `Esc`-Shortcut) on the very top of the window, enter the name of the op you just created – `HelloOp` and press Enter.
You now see your newly created op with one input- and one output-port:
@@ -100,7 +100,7 @@ const multiplyValueIn = op.inFloat("Multiply amount");
This creates a second port and a new part on the object pane which allows us to set the multiplication amount.
Your op should now look like this
-
+
Your code should look like this
diff --git a/md/5_writing_ops/dev_hello_op/img/c-final_picture.PNG b/md/5_writing_ops/dev_hello_op/img/c-final_picture.PNG
deleted file mode 100644
index e46a954..0000000
Binary files a/md/5_writing_ops/dev_hello_op/img/c-final_picture.PNG and /dev/null differ
diff --git a/md/faq/webgl_differences/img/resize_POT.png b/md/faq/webgl_differences/img/resize_pot.png
similarity index 100%
rename from md/faq/webgl_differences/img/resize_POT.png
rename to md/faq/webgl_differences/img/resize_pot.png
diff --git a/md/faq/webgl_differences/img/resized_POT.png b/md/faq/webgl_differences/img/resized_pot.png
similarity index 100%
rename from md/faq/webgl_differences/img/resized_POT.png
rename to md/faq/webgl_differences/img/resized_pot.png
diff --git a/md/faq/webgl_differences/webgl_differences.md b/md/faq/webgl_differences/webgl_differences.md
index 104ec78..b8d1670 100644
--- a/md/faq/webgl_differences/webgl_differences.md
+++ b/md/faq/webgl_differences/webgl_differences.md
@@ -45,13 +45,13 @@ Fortunately, cables allows you to resize a texture to the closest power of two w
If you open the file browser and click on the texture you desire to resize, the following options will appear:
-
+
If you look at the bottom of the screenshot, you can see marked in yellow the current size of your image. At the bottom right of your dimensions, there are a few buttons that allow you to process your image through cables. The relevant button to resize to the next power of two is marked in bright green.
After clicking it, a dialogue appears and asks you if you want to resize the texture. If you do that, the following dialogue will appear:
-
+
Your texture is now resized to the next power of two and usable for mipmapping in WebGL1.