9.43.3 Can you answer these questions?

9.43.3.1 How can I set a default value to 'scale on screen' when inserting an image?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=689316

When inserting an image, it always appears too large on the editor, and I end up turning the next setting to 20%-30%: 
How can I set a default value to that field, so that every time I insert an image ... 
[lyx]
 

asked by sadcat_1 https://tex.stackexchange.com/landing/r/digest?cta=user&id=260974 Score of 1

9.43.3.2 Equation with error Misplaced alignment tab character &. and hbox overfull

https://tex.stackexchange.com/landing/r/digest?cta=question&id=689682

\begin{equation} \label{Vivi2} 
\dot{r}_{i}^{\text{in}} + \sum_{\omega}^{\Omega}(f^\omega\dot{r}_i^{\omega, \text{in}} -f^\omega\dot{r}_i^{\omega, \text{out}}) = \dot{r}_{i}^{\text{out}} \quad\... 
[align]
 

asked by Samantha Marie Rebolledo https://tex.stackexchange.com/landing/r/digest?cta=user&id=299747 Score of 1

9.43.3.3 Use of \noindent in a code=   of tcolorbox yields wacky vertical spacing

https://tex.stackexchange.com/landing/r/digest?cta=question&id=689303

I adpated the code={} solution from Auto append prefix to tcolorbox's title to include a prefix to a title of a tcolorbox and was getting wacky spacing for a subsequent use of the mytitlebox ... 
[tcolorbox] [conditionals] [frame-title]
 

asked by Peter Grill https://tex.stackexchange.com/landing/r/digest?cta=user&id=4301 Score of 1