Merge pull request 'Update Readme units and geometry' (#1) from gmarx-patch-1 into master

Reviewed-on: http://gmarx.jumpingcrab.com:8088/Latex/jade-latex/pulls/1

Readme.md

@@ -7,6 +7,9 @@ The repository is organized in the next way. The `1_basics` folder includes info
 
 ## Webinar Contents ##
 Here you can find the highlights of each day lecture, to avoid repetitive points during the webinar.
+
+-------
+
 ### Day 1: Introduction (Marx)
   * What is LaTeX?
   * How LaTeX works?
@@ -18,18 +21,26 @@ Here you can find the highlights of each day lecture, to avoid repetitive points
   * A dummy text definition command
 
 
-#### Geometry and Lengths
-##### Units 
+  #### Geometry and Lengths
+
+  ##### Geometry package 
+
+  ![](https://sharelatex-wiki-cdn-671420.c.cdn77.org/learn-scripts/images/f/fc/Layout-dimensions.png)
 
-| Abbreviation	| Value |
-|pt|	a point is approximately 1/72.27 inch, that means about 0.0138 inch or 0.3515 mm (exactly point is defined as 1/864 of American printer’s foot that is 249/250 of English foot)|
-mm	a millimeter
-cm	a centimeter
-in	inch
-ex	roughly the height of an 'x' (lowercase) in the current font (it depends on the font used)
-em	roughly the width of an 'M' (uppercase) in the current font (it depends on the font used)
-mu	math unit equal to 1/18 em, where em is taken from the math symbols family
+  ##### Units 
+  The next table list the valid units used on LaTeX [^1].
+  | Abbreviation	| Value |
+  |--------------|--------|
+  | `pt` |	a point is approximately 1/72.27 inch, that means about 0.0138 inch or 0.3515 mm (exactly point is defined as 1/864 of American printer’s foot that is 249/250 of English foot)|
+  |`mm`|	a millimeter|
+  |`cm`|	a centimeter|
+  |`in`|	inch|
+  |`ex`	|roughly the height of an 'x' (lowercase) in the current font (it depends on the font used)|
+  |`em`	|roughly the width of an 'M' (uppercase) in the current font (it depends on the font used)|
+  |`mu`	|math unit equal to 1/18 em, where em is taken from the math symbols family|
+  [^1]: Extracted from [Overleaf](https://www.overleaf.com/learn/latex/Lengths_in_LaTeX)
 
+  ----
 
 ### Day 2: Document Classes and Sectional Units ###
 ### Day 3: Equations, Tables and Figures (Marx) ###