There are four ways to add new contacts and companies into Crono.
The simplest way to add a contact or company is to type in the details yourself. From your Lists page, click the +Add button in the top-right corner.

Fill in everything you have for that contact or company, then confirm with Add at the bottom right of the creation window.
Best when you have a handful of leads to add, or want to be sure every detail is right.
Find New is Crono's built-in prospecting search: apply filters, find the people and companies that match your target audience, and add them straight into your database.
Find New searches one of two data sources, and which one you get depends on your LinkedIn licence:
Sales Navigator — if you have an active Sales Navigator licence, Find New uses it by default, giving you its full filter set and the Include / Exclude and AND / OR / NOT options.
The Crono Database — if you do not have Sales Navigator, Find New searches Crono's own database instead. You can still filter and build a target list; the available filters differ.
Either way you select the results you want and add them to Crono, optionally enriching them, tagging them, assigning an owner or enrolling them into a sequence as you go.

Full walkthroughs: finding and creating contacts and finding and creating companies.
If you spend your day on LinkedIn or Sales Navigator, the Crono extension lets you add people without leaving the page. On any profile, click Add to Crono; on a search results page, open the extension panel and click Find to pull in everyone on the page.
Before importing you can enrich the records, add them to a list, apply tags, change ownership, and enrol contacts into a sequence — individually or in bulk.

Step by step: How to add contacts and companies from LinkedIn.
To add a large number of records at once, upload a CSV and map its columns to Crono's fields.
Choose whether you are importing Contacts or Companies — they are separate imports.
Upload your CSV file.
Map every column to the matching Crono field. Keep first name and last name in separate columns, or personalisation variables will not resolve later.
Optionally enrich the records as they come in, to fill gaps your file does not cover.

Choosing between Contacts and Companies import

Uploading the file

Mapping the columns

Enriching as you import

Enrichment during import spends credits in the normal way — see Credits in Crono.