I know there are many.

What I want is the simplest white paper which is always accessible without clicking.

As I said just as a white paperpad lying on my office desk

If you're using Windows, the built in Sticky Notes will do. You can change the colour to white. You can add it to start up items too.

9 hours ago, THAIPHUKET said:

I know there are many.

What I want is the simplest white paper which is always accessible without clicking.

As I said just as a white paperpad lying on my office desk

If you have an iDevice the notes app is available by swiping from the bottom right corner. Otherwise AFIK you have to use actual paper and pencil, though you revere to a previous post that doesn’t exist in this thread.

2 hours ago, sometimewoodworker said:

If you have an iDevice the notes app is available by swiping from the bottom right corner. Otherwise AFIK you have to use actual paper and pencil, though you revere to a previous post that doesn’t exist in this thread.

 my friend thank you for the answer and you make one shortcoming of Android clear.

2 minutes ago, THAIPHUKET said:

 my friend thank you for the answer and you make one shortcoming of Android clear.

To be clear, I don’t use other than Apple devices for communication or computing, so I don’t know if android has a similar function available either natively or with an app. But I do know that my iPad Pro has this feature built in for those who want it, personally I don’t use it, maybe I should.