Using the ChemAxon Marvin sketch tool you are able to draw (or import) compound/reaction structure.
Add compounds & Reactions to a section
Click anywhere on the section to open the edit toolbar --> click on 'More' --> choose 'Add compound/Reaction' to open the sketch window
1.2- Draw or import a structure (using the folder icon on the top left) --> save when finished --> the new drawings are added to the section as an element. Clicking on the element allows re-editing.
1.3 - Describe a reaction in a similar way, once a reaction is created, a stoichiometric table divided into reactants and products appears underneath giving the formula and the MW of each compound. More information such as Name, Volume, Molar ratio, and more can be populated by you.
Calculations of the weight for each compound and the yield of the reaction is available upon the population of the fields named before.
All compounds/reactions added in the ELN, are automatically added to your compounds collection in the Inventory, where extra information can be added.
To learn more on how to work with Marvin JS, check out it's online manual here.